Thread: Got a 478...
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Old June 27th, 2022, 09:58 PM
Prowbar Prowbar is offline
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Join Date: Dec 2020
Location: Friesland, the Netherlands
Truck: 1965 GMC 1500, 478 V6, SM420
Posts: 386
Rep Power: 183
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Default Got a 478...

Always wanted to get a bigger V6 than the 305 that I now have... Yes sir I found one. To find one of these in the Netherlands, especially a 478, is a one-in-a-million chance...

A standard, non magnum 478. Complete engine with new gasket set, although in parts at the moment. With all the large truck accessories, such as bell housing, flywheel, clutch, air compressor, generator, brackets, etc. If you're looking for large truck accessories I'd be happy to help.

The engine is in very good condition and looks to be a fairly low mileage engine. One of the exhaust valves is burned though, will need a new one for that, or have this one repaired.

My plan is to build this engine to replace the 305 that is now in my 1500.
It will be a stock rebuild, with a couple of minor modifications.

I've been studying Bigblock V6's posts on his 478 swap, but still have a couple of questions. If we could come into contact that'd be great!

The plan is to convert the engine to use all the light truck accessories, such as the bell housing, water pump, and timing chain.
Will have to fab up a flywheel and have it balanced.

My guess is that the engine is a 62, one of the first 478's. No PCV valves in the head, but does have the fresh air canister on the back left side. My guess for a 62 is the fact that it came with a generator instead of the alternator.

Your thoughts?
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Last edited by Prowbar; June 27th, 2022 at 10:23 PM.
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