Always upgrade valvesprings IMO.Any decent blower on top of that plus a maybe a spring upgrade would take you to the block limits. If the crank is forged... bonus.
Always upgrade valvesprings IMO.
If we're trying to get to the blocks limit don't you think the cylinder heads are an even bigger waste of money with a blower?
Thats a good plan, it will be slugish if you don't add the supporting cast. I would run what you got in the car and build a block up with the 408 stuff and drop it in, this way you can take care of those unexpected things and save on gaskets.So after reading through the replies you all have given and why i would build a 408 intread of the 302. Well the friend i got these heads from also gave me the rest of the 408 minus block (which had cracked) and a few other parts that ill need. so i have the cam, intake, heads, rotating assembly and what not. I figured I might as well use the heads while saving for the block.
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