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460 swap into a 78 Bronco

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viven44

Re: 460 swap into a 78 Bronco

This is from splash, correct ? Water permeating through the threads?

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with a 460 from an 86 Bullnose/C6

BigBrother-84

Re: 460 swap into a 78 Bronco

Yep, IMHO.

Jeff / 1984 F350 Crew Cab 4x4/5.8L w351 4V/ T18/ D50 4.10 front/ 8' bed.
Restored 2019-2022.
Nicknamed «Big Brother 1984», due to its soooo-looong shape & nod to George Orwell's 1984 famous novel.

viven44

Re: 460 swap into a 78 Bronco

OK thanks! I've never thought of that. Thread sealer - DONE!

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with a 460 from an 86 Bullnose/C6

viven44

Re: 460 swap into a 78 Bronco

This post was updated on .

Media blasted the floors after covering the dash. The harbor freight 50lb capacity $35 blaster along with my 60gal compressor did short work of it. I only used half a 50lb bag of the fine media from Tractor Supply. The bag was only $12.99.

I ran it at 60PSI pressure and even the 60gal compressor had to run quite a bit to keep up. So I would be very surprised if a small compressor can do it.

Thanks Jim for introducing me to this wonderful capability. I wish I had this for the intake manifold!!

I do plan to use the POR-15 system to finish up the floors since I didn't blast everything down to perfect smoothness. Probably be the easiest way to do it.

Found an ecosystem in the cowl drain!!

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with a 460 from an 86 Bullnose/C6

ArdWrknTrk

Re: 460 swap into a 78 Bronco

Administrator

It's looking good enough for paint.

Don't thank me. There's thousands of not millions before me.
Glad it's worked out well for you!

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Gary Lewis

Re: 460 swap into a 78 Bronco

Administrator

In reply to this post by viven44

Glad it worked and that your experience was better than mine.

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

viven44

Re: 460 swap into a 78 Bronco

In reply to this post by ArdWrknTrk

If everything looked like in the blue circle it would be ideal.

There is a lot of roughness still there. The area in the purple circle is very rough. If I blasted it enough it becomes like the area in the red circle.

The area in the purple circle, if that is considered bare metal, I would go to paint but I’m afraid it’s partly oxidized. The whole pan is still very solid though.

I could have spent more time blasting, but with my eye protection fogging up and all that dust I kind of had to pause.

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with a 460 from an 86 Bullnose/C6

viven44

Re: 460 swap into a 78 Bronco

In reply to this post by Gary Lewis

It wasn't an wholly pleasant experience to be honest. With the eye protection fogging up, and all stuff everywhere, it wasn't a perfect experience.

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with a 460 from an 86 Bullnose/C6

Gary Lewis

Re: 460 swap into a 78 Bronco

Administrator

You need some way to kill any rust that is lingering. But the texture will allow paint to adhere nicely.

As for the less-than-perfect experience, yup. Now let's see how many days you find media in places you didn't know you have.

Gary, AKA "Gary fellow": Profile

viven44

Re: 460 swap into a 78 Bronco

I was covered head to toe since I had some warning from you!!

I found a bunch in my ears still.

My goal is to use the POR-15 system which has a metal prep to help neutralize any remaining rust.

The process works extremely fast for stripping paint as paint molecules are weak. The difficult part which took a lot of blasting was actually smoothing down the pitted areas. That is actual physical bombardment to remove metal atoms. But hard to strip hopefully means whatever is remaining is very sound and will last.

I now have a gameplan to strip paint from the old hood in areas with surface rust

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with a 460 from an 86 Bullnose/C6

Gary Lewis

Re: 460 swap into a 78 Bronco

Administrator

Be VERY careful with things like hoods. You can easily heat the metal and cause waves in it, which you cannot get out.

Gary, AKA "Gary fellow": Profile

viven44

Re: 460 swap into a 78 Bronco

Noted

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with a 460 from an 86 Bullnose/C6

ArdWrknTrk

Re: 460 swap into a 78 Bronco

Administrator

In reply to this post by viven44

Which is why I said I'd use phosphoric acid.
Or citric or oxcylic acid, but these don't change rust into iron phosphate which is inert.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

viven44

Re: 460 swap into a 78 Bronco

The black rust is the good variety.. Iron 2 oxide Fe3O4 and more stable. I think if I do an etch using the POR-15 metal etch chemistry it will remove any low-level iron 3 oxide and promote adhesion of POR-15 to Iron 2 oxide.

Iron phosphate. Now thats something. The famous Iron pillar of delhi has it
https://en.wikipedia.org/wiki/Iron_pillar_of_Delhi

I'm going to look into phosphoric acid!!!

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with a 460 from an 86 Bullnose/C6

ArdWrknTrk

Re: 460 swap into a 78 Bronco

Administrator

It's STILL iron oxide, not iron phosphate or iron tannate.(from oak and other things with high tannic acid)

IMHO no rust is "good" rust.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

viven44

Re: 460 swap into a 78 Bronco

I'm looking into phosphoric acid now!!

Sounds like after phosphoric acid application, you don't rinse off. Just remove any residue and its ready for primer ?

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with a 460 from an 86 Bullnose/C6

ArdWrknTrk

Re: 460 swap into a 78 Bronco

Administrator

This post was updated on .

I've mentioned this stuff multiple times, as a far less expensive alternative to Ospho.
You can easily get the instructions and SDS online.

(correct run-on word)

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

viven44

Re: 460 swap into a 78 Bronco

OK cool

You know your stuff

https://youtu.be/98Oxee5xbdg?si=g4L75d1lJwmpO7eF

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with a 460 from an 86 Bullnose/C6

viven44

Re: 460 swap into a 78 Bronco

I'm wrangling the kids this weekend with wife in a church camp. I went to Home depot and ace hardware and no one had phosphoric acid. Another home depot location had 3 Klean strips in stock but it was a drive. Just decided to pick up the POR-15 kit from Autozone that comes with degreaser, metal prep (phosphoric acid mainly) and about 4oz POR-15. Kit says it will cover two coats up to 6 sq ft so it should be sufficient.

I understand what you meant Jim. I have to find time to do 2-3 coats of POR-15 and then a final top coat, all about 3-4 hours spaced apart. Its going to be a pain.

Its just the pans to be really well sealed so decided to take the proven POR-15 approach as the kit comes with phosphoric acid. Just about everyone including project farm has come out with POR-15 on top in their testing.

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with a 460 from an 86 Bullnose/C6

ArdWrknTrk

Re: 460 swap into a 78 Bronco

Administrator

I bought it....once.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

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