My gas Tahoe had a bad day on me...

[THEFERMANATOR]

Originally Posted by Genie Aye

GM makes what they call "hot cams" for all their roller motors that slide in with NO mods according to the cataloge.

The real hold back is the .450 lift limitation(they say you can go .480, but I like to have a safety cushion between the seal and retainer so as to not crush the valve guide seals). You can drop in an LT1 or LT4 camshaft as they are only about .440 lift, but your still not going to see a huge jump in HP with it. I've put cams in them, and to get any real increase the heads or springs need to be modified to allow for higher lift. And the 383 vortec crate engine is one EXPENSIVE drop in engine unless it came down in price. I priced one out for somebody 4 years ago, and they wanted about $6K for one.