- Dec 29, 2015
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You're going to need all of that and a lot of compression to get 450rwhp out of a 347. 450rwhp is a tall order. You can get to around 375-400 with just a better intake and a 205cc head and reuse your cam etc. It should peak in the 6-6300rpm range. If you're going to make a max effort stock block that's the direction I would use. If you went the solid cam/shaft rockers-225cc head, you would have to shift that at a very high rpm(72-7500+rpm). Stock blocks do not like high rpms and will eventually break.
You could just throw a small nitrous kit on and make 450 easy.
Another serious question:
Is it mainly the power that kills these blocks or the RPMs required to get to said power NA?
Just wondering how safe bumping up to 450 with nitrous would be. Because id imagine i would still be able to keep the RPMs below 6500 with a kit and get the job done that way
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