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1986 F-250 build/rebuild progress thread.


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I can't remember who said to make a progress thread on here, but you asked for it :nabble_smiley_teeth:

Here I'll be posting pics and progress posts of when I tear the engine and transmission out of this heap in the following month or so. I'll be installing a new ATK long/short block that I'm going to do some stuff to. I'll be installing a Comp Cams 255DEH camshaft in it, a double roller timing set, reusing my Edelbrock E street 5023 cylinder heads from my old engine and rebuilding the C6 transmission myself. I've done one C6 before and it's holding up to 500HP/500TQ just fine, so this isn't a problem. For the C6 I also have some upgrades. A Torco 2000-2500 stall converter, an ALTO high energy clutch master build kit and a TCI low drag/full roller kit to install to replace the thrust washers with torrington bearings. I already have a shift kit installed. Here's some pics I took of the long block as it arrived today. It appears they sent me the crem de la crem for an engine block. A late 1969 for 1970 351W block which should be the 9.480" deck height. I had a thought of wouldn't it be nice if they sent me one of those the other day and laughed thinking yeah right, well turns out I seem to have gotten what I wished for.440080204_346527655110265_7438342428890018821_n.jpg.8b232a964e5f44b0679776eabee4f25a.jpg441986647_2199423320401751_3359010292332035232_n.jpg.1a8de94b5f2ba592bfce9dce3753d633.jpg440394565_1486441548947803_5411479755244040996_n.jpg.59d49c65e612269d00c038afe6a520b1.jpg

I'll be pulling the heads off in the morning but from what I saw through a sparkplug hole it's .040" overbore and the crosshatching grit pattern is really fine from what I can see from the bottom so it should have moly rings.

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Probably me, and I'm glad you did!

((Progress is Gooooood! :nabble_smiley_good:))

That's awesome that you got the low deck block right out the gate!

I'm always recommending to 460 folks to have their block squared and zero decked.

Often I wonder if they understand how much it helps, not only with getting good compression numbers, but with quench.

I've built a few 5.0 Windsors back when I was into Mustangs.

500/500 is already a very solid number for a 351!

What are you shooting for from this build? :nabble_smiley_super:

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Probably me, and I'm glad you did!

((Progress is Gooooood! :nabble_smiley_good:))

That's awesome that you got the low deck block right out the gate!

I'm always recommending to 460 folks to have their block squared and zero decked.

Often I wonder if they understand how much it helps, not only with getting good compression numbers, but with quench.

I've built a few 5.0 Windsors back when I was into Mustangs.

500/500 is already a very solid number for a 351!

What are you shooting for from this build? :nabble_smiley_super:

Oh, the 500HP/500TQ engine is a 445 FE stroker that C6 is behind that I did with my dad years ago. I have no idea what this one will make. 300-325 HP? it should be pretty much the same as what's in the truck now except the cam is slightly different. I had my 390 zero decked and man will that thing throw ya back at 10:1 compression. It's surprised a lot of people considering its got a stock 1964 352 cast iron intake and exhaust manifolds. Actually, that stock zero decked 390 with an XE262H cam blows the absolute doors off this current 351W with the Edelbrock heads, Weiand stealth intake, Hooker long tubes and the custom 2.5" dual to 3" single exhaust. If I can make this thing run as good as that pretty much stock 390 I'll be real happy.

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Oh, the 500HP/500TQ engine is a 445 FE stroker that C6 is behind that I did with my dad years ago. I have no idea what this one will make. 300-325 HP? it should be pretty much the same as what's in the truck now except the cam is slightly different. I had my 390 zero decked and man will that thing throw ya back at 10:1 compression. It's surprised a lot of people considering its got a stock 1964 352 cast iron intake and exhaust manifolds. Actually, that stock zero decked 390 with an XE262H cam blows the absolute doors off this current 351W with the Edelbrock heads, Weiand stealth intake, Hooker long tubes and the custom 2.5" dual to 3" single exhaust. If I can make this thing run as good as that pretty much stock 390 I'll be real happy.

Alright I did quite a bit to this thing today. I pulled the heads off, they're D8OE heads, no surprise there. The pistons are about .018" in the hole, not terrible. Quench should be .057" with that and a .039" head gasket which is a lot better than the current engine. The crank is .020" under on rod and main and it's got king bearings in it, which is fine with me that's what I used on my last two engine builds with great success. Deck surfaces appear to be resurfaced, main and rod clearances plastigaged out to .0015". Cylinder 4 had some minor scuffing I assume from what looked like some flash rust in the cylinders. I took that piston out and cleaned the cylinder wall up with some scotchbrite real lightly and deburred the bottom edge of the piston skirts and cleaned everything. It's looking the same after about 10 rotations and can't really catch your fingernail on any of it its just kind of ugly. Engine turns over nicely. I put the Comp 255DEH in it and put the Cloyes street true roller double roller on it. I've got a set of F1DZ-6500-A OEM Ford lifters I want to use but the lifters it came with look really nicely ground also so I'll definitely be hanging onto those. The cam that came out appears to be about .410" lift or so. Probably the same powerless cam I took out of the current engine 11 years ago. Overall this thing looks pretty good and it should run just fine.

One thing I noticed, this must have been an original 1969 or 1970 351W they remanufactured because it's got C9OE rods and looks like a matching crank also.440763180_3710288879207634_1060872981665762069_n.jpg.0ee5e1c0f8faf1b303013994731704ff.jpg439203386_1109281293627839_1112606624221640047_n.jpg.8525fb3cf51f320b3edb642dc905534e.jpg441990954_1225508718427150_7347966989858613254_n.jpg.393df587428d247004c1a9440b333a0d.jpg441254261_1870612740067564_5445546372254280675_n.jpg.ba0b7c7e1396043107db696dc86760d8.jpg440436322_980143030497060_1630121958317315162_n.jpg.e2bd55c31179b0146e693f58cf3888d5.jpg437741347_9844029675612912_1518655562771343798_n.jpg.5b45178cdf433d1403db493a93a312ad.jpg440258569_1889195234873179_3881198487666677477_n.jpg.bdc80763aac11d4c3107a962c9456c6d.jpg441973612_431665886289480_3111919419482048823_n.jpg.faefe0a175437e2dd8ad71f9ba1312db.jpg440127641_1468710410729554_8789539703376013493_n.jpg.afda07393bb125b4dafc580639b10d93.jpg

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Alright I did quite a bit to this thing today. I pulled the heads off, they're D8OE heads, no surprise there. The pistons are about .018" in the hole, not terrible. Quench should be .057" with that and a .039" head gasket which is a lot better than the current engine. The crank is .020" under on rod and main and it's got king bearings in it, which is fine with me that's what I used on my last two engine builds with great success. Deck surfaces appear to be resurfaced, main and rod clearances plastigaged out to .0015". Cylinder 4 had some minor scuffing I assume from what looked like some flash rust in the cylinders. I took that piston out and cleaned the cylinder wall up with some scotchbrite real lightly and deburred the bottom edge of the piston skirts and cleaned everything. It's looking the same after about 10 rotations and can't really catch your fingernail on any of it its just kind of ugly. Engine turns over nicely. I put the Comp 255DEH in it and put the Cloyes street true roller double roller on it. I've got a set of F1DZ-6500-A OEM Ford lifters I want to use but the lifters it came with look really nicely ground also so I'll definitely be hanging onto those. The cam that came out appears to be about .410" lift or so. Probably the same powerless cam I took out of the current engine 11 years ago. Overall this thing looks pretty good and it should run just fine.

One thing I noticed, this must have been an original 1969 or 1970 351W they remanufactured because it's got C9OE rods and looks like a matching crank also.

You really lucked out. :nabble_smiley_good:

However, having done a bunch porting on a pair of D80E heads I can tell you they don't come much worse. Not that you need to change, but I can tell you that there isn't a lot you can do to make them better w/o a ton of work. And even then they aren't all that much better. :nabble_smiley_sad:

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You really lucked out. :nabble_smiley_good:

However, having done a bunch porting on a pair of D80E heads I can tell you they don't come much worse. Not that you need to change, but I can tell you that there isn't a lot you can do to make them better w/o a ton of work. And even then they aren't all that much better. :nabble_smiley_sad:

Yeah I'm not gonna use the D8OE heads on this one but these are what I took off the current engine and the thing ran pretty good with the comp xe250h cam and the D8OE heads but it runs a whole lot better with the Edelbrock heads on it now.

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Yeah I'm not gonna use the D8OE heads on this one but these are what I took off the current engine and the thing ran pretty good with the comp xe250h cam and the D8OE heads but it runs a whole lot better with the Edelbrock heads on it now.

Good plan, Stan. The Eddy heads are a big improvement. :nabble_smiley_good:

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  • 1 month later...

Good plan, Stan. The Eddy heads are a big improvement. :nabble_smiley_good:

Alright some progress has been made with the new engine. I bought a set of Flotek 203-505FT heads instead of reusing the Edelbrocks on this engine as I am pretty sure the engine is consuming coolant now and its getting worse every time I drive it. Not sure if using the stock Fel-Pro replacement gaskets with aluminum heads was a bad idea back in 2016 or if the deck surface wasn't optimal or what but I didn't feel like finding out last minute there's something wrong with the heads. I'll just check them out and reuse the old heads on the old engine when I go through and rebuild it for a spare engine eventually. I also noticed a partial VIN on the new engine, anyone care to try to decode what it came from? 1970 something I know that. 448108559_1424892278166375_5581819838745800978_n.jpg.b9c84f1fc7b552de9fef536634678c98.jpg448074830_311201865382176_9163499544572255024_n.jpg.79b332b032f0056fa35fce3d1c83a98f.jpg448080844_1416116652373139_5769327339287552509_n.jpg.840bb3fbdad34816027b9bd0275e539c.jpg

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Alright some progress has been made with the new engine. I bought a set of Flotek 203-505FT heads instead of reusing the Edelbrocks on this engine as I am pretty sure the engine is consuming coolant now and its getting worse every time I drive it. Not sure if using the stock Fel-Pro replacement gaskets with aluminum heads was a bad idea back in 2016 or if the deck surface wasn't optimal or what but I didn't feel like finding out last minute there's something wrong with the heads. I'll just check them out and reuse the old heads on the old engine when I go through and rebuild it for a spare engine eventually. I also noticed a partial VIN on the new engine, anyone care to try to decode what it came from? 1970 something I know that.

Oh man that's pretty! ❤️

Which head gaskets did you use w/ the Flotech heads?

Do you think the slightly bigger port volumes will affect bottom end with that cam?

There used to be a kid here in town that had a very healthy 351(ish :nabble_smiley_wink:) in his Mustang.

He had some kind of 4-link or alternate rear suspension because there's no way a car that light should hook as hard as it did.

Word spread fast not to even try... :nabble_smiley_whistling:

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