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On a factory slider the part that sits in the gasket is the full width of the track and fixed glass together. An aftermarket slider has a 'fin' that fits the thinner groove of a gasket for a single lite rear window. I hope I'm being clear?. .. 🤔 I know that my condition leaves me obtuse and bellicose sometimes.

Empirically, I can take my set of number drills and come close to a size for my blue restrictor. Whether that's best, for a 300, I can't say. 🧐

Counterintuitively, the number ON a part is not the part number... We need to cross reference the engineering number to an actual part number. This is a bit of a challenge on my phone and I'm stepping into the dentist right now! I may not be in the mood to plug away in an hour, but perhaps Gary can look?

Okay, I realize that everything is relative. 😉 I REALLY hope it's something as simple as a pinched return. Please let us know what you find!

Harrowing experience in the Pacific Northwet! I'm not sure if this one has a smaller piston. It seems to work fine, and it's much easier for me with an actual bleeder.

Yep, mine is blue. I think I even have a picture of it...

Okay. At this point we're going to have to consider the clutch fork or mushroom pivot as the last components untouched. I don't know how or if I can help, but I'm ready to do whatever I can.

Okay. Sometimes you just have to drive it and let all the bubbles shake out. I understand this isn't so easy with a bucket truck. But I have given this advice to many people so frustrated they want to set their hair on fire (including Gary) and I've never had anyone come back saying it didn't recover itself within a mile or two.

Hoo boy! I have traveled this path before! The Windsor Zf uses a concentric slave bolted to the back of the bell housing and NO release arm. The Zf has a bigger diameter (1 1/4") 10 spline input shaft. You need a new clutch disc for it to fit. Did the metal slave cylinder have an actual bleed nipple on the front(top)? I have an Excedy SC886 slave for a T-18 in a 351 and it fits everywhere, but I can take a piece of vinyl hose and run it up, right back into the master cylinder. https://a.co/d/ecDoKf6 When I bleed, I'm just pumping the fluid in a loop! 💡 BTDT, BTTS with the stud on the belcrank. I rifled the truck and found a 9mm shell casing.... Walked to the hardware. Bought some JB Quick, a couple of washers and a circlip that fit the extractor groove. Yeah, that was fun, but it got me home! 😉 I'm here for you! I'm that savant who's taken one of these to pieces in the dark and reassembled it with their eyes closed like field stripping a damn M1 Garand. 😂 "This is my rifle, this is my gun...". Have a grin and a gold star if you know exactly where I'm coming from...

The thermal valve is a wax pellet that expands inside the threaded in portion I don't think 'abrupt' is a problem... What would be good is to determine what each colour means in terms of orifice. Then you could just use carburetor jets or something else analogous in their stead.

It's possible to tune for ported if you're going to recurve the distributor and install a new vacuum advance, but at that point one of Scotties custom curved distributors is only a few bucks away. But not back in the day when the advance was $15 and the springs 2. A Reman distributor was $35 and you only needed a welder or some brass tube from the hobby shop to tighten up the slot.

VREST is a tiny winged plastic orifice that fits inline of the vacuum tube. Different colours denote different restrictions. Lots of people with automatics like ported vacuum, but it won't step up the idle if needed. I'm not sure why Ford never seemed to use ported. Many Autolite/Motorcraft carbs have an E port for the EGR, and I'm pretty sure that is ported.

460 pickups are one of my "special interests" Along with material science, propellant chemistry, genetics and biology, long distance firearms and a few others. Way back in the early '70's they didn't have a category for autodidactic kids with an IQ over 160. I was "Profoundly-talented and gifted" but I couldn't get along with my peers....

Look at the routing sticker. You will see VREST in one of the lines going to the thermal switch. If the coolant hits 220 the port shifts to full manifold vacuum and the advance plate gets pulled in more. Which brings the timing up and the idle is increased.

I do what I can with my superpowers....

Nope It's missing entirely. That's why it was overheating and the idiots pulled the thermostat hoping it would help. But nothing is going to help the water pump push if the impeller is not closed off.

Yeah, nobody in the aftermarket used plastic gears, but dealers had to. They couldn't install a part that would violate federal regulations at the date of manufacture. Sometimes a garage would buy parts from the dealership. If so they'd get a plastic gear and retarded hyvo chain too.

This is why the 460 distributor is controlled by the thermal switch in the water neck. If the truck starts to overheat while stopped in traffic, the three port valve switches from restricted vacuum to manifold vacuum, and the increased timing revs up the pump and fan. It's not digital, but it's not wrong...

CJ, I think the trick is choosing one of the 5 different EGR valves to work with the tune of your aftermarket carburetor. I don't have any info on which ones flow what amount of exhaust .. Maybe Bill or Gary has some insight???

You're in Georgia. My sister lives in Charleston and she said it was 80 today. I'm in CT, sitting in a dang flatbed until 8 tomorrow. It's supposed to be 20. 🥶

Maybe I am half blind from arc flash and I'm looking at my phone in the dark, sitting here in my truck? There definitely needs to be a backing plate. I think I gave the # in the other thread. (Which is one reason it frustrates me no end to chase stupid questions around the forum again and again) Plastic gears were in every 460 off the factory floor, except some super rare homogulation special race cars with the SCJ's Ford used them to meet noise limits. It was plastic teeth bonded to a alloy gear blank. You don't really need me to go find pics for you, do you? There might be some in my 2008 engine swap thread on FTE I think I'm still all paid up at Flickr.

390/429 medium trucks use a really weird thermostat housing, a governed carb and a long snout on the crank that you can't fit into a pickup. I believe they were also all internally balanced. For sure there was never a car 429 that was external. And I don't recall ever seeing a tomahawk on any bucket trucks that I had to fix.

All 460's came with an eccentric. Hot Fuel trucks have a block off plate on the timing case.

Not to mention that the engine components haven't reached their designed tolerances. Everything is either loose or tight, depending.

You are wrong. I have pictures to prove it.