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Old Jun 22, 2020 | 12:31 PM
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400 Build

So I'm back at this after a few years off. Long story short, my email to TMeyer was bounced and in it said they are no longer machining/building engines. Bummed about that but it is what it is.

I have two engines - 400 and 351M both complete, running. I'm leaning towards the 351M block because it is a 79 and came from a truck. If I'm going to build a complete new motor with the goal of 500 HP +, I want to verify what I will keep, if anything besides the block? I wanted to get the 351M disassembled and ready to go for the machine shop when I am ready for the engine build. It doesn't appear to me that any of the other parts (heads, rotating assembly, etc.) have much if any value. So I was going to pitch it all, get the block cleaned/magnafluxed and ready to go. Is this a bad idea?

Also, what should I do with the running 400? Keep it "just in case?" Thanks for your thoughts.

 
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Old Jun 30, 2020 | 11:44 AM
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Any thoughts here? Appreciate your feedback!
 
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Old Jul 1, 2020 | 11:40 PM
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You will want to keep the 400 crankshaft as those are not getting any easier to find. Connecting rods are the same, although at 500 HP you might consider a set from Molnar.
 
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Old Jul 7, 2020 | 01:42 PM
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From: s/e iowa
i have noticed over the years, owning these trucks draws other people owning these trucks. i have been able to help out many people needing push rods, rockers, exhaust manifolds any truck part that i have accumulated for that matter. usually give the parts needed or trade for something i need.

btw, to get 500hp, will that require a roller cam? can a roller be used in one of these engines?
 
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Old Jul 7, 2020 | 04:26 PM
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Can you use a roller cam in a 335 series engine? Absolutely! I have a Howard's retrofit cam in mine. There are two ways to do it - 1) install a "retrofit" kit that uses link bar lifters or 2) use a roller lifter setup from the original 5.0, this uses special roller lifters and a "spider" that mounts in the lifter valley to prevent the lifters from rotating.

I highly recommend a roller cam for those that can afford it, just so you don't have to worry about wiping out a can live on a flat tappet cam.

You don't necessarily need a roller camshaft, but at the 500HP level most people would say use one, myself included.
 
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