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Message: <blockquote data-quote="SBSVT" data-source="post: 742408" data-attributes="member: 12220"><p>My engine is stock with only an O/R H-Pipe and 40 series flows. I was curious as to will 4v or 3v heads fit firectly on the npi block? If so what all needs to be done to make it work and around what are the power gains? I've been looking online for a while on if this is possible but I can find anything, maybe I'm just looking in the wrong spots i dont know. Also I have a question about the PI intake swap, I read something about it needing to be shaved or something in a one another, whats the deal with that? I thought you just needed gaskets and some good ol rtv. Which gaskets do you need I've read some saying NPI gaskets and some saying PI gaskets. I'm looking to do the intake and cams soon since I've recently discovered that MHS has the PI cams on their ebay store for like $68 shipped.</p></blockquote><p></p>