I picked up a 2001 GM crate 350 with 40k miles. Roller cam motor, but it was a TBI setup, which I'm not going to mess with. So those heads will be hitting craigslist along with the fuel injection setup. In the meantime, I picked up a set of 062 vortec heads.
I've read I can use LS3/LS6 valve springs, Comp Cams retainers, and Dodge Daytona turbo 4 cylinder valve seals. This will give me up to .550 valve lift before coil bind (stock limits were .490 I believe). I am going to run an LT4 hot cam and 1.6 GMPP roller rockers which give me a max lift of .529.
My question is, is there any reason to go to the larger valves (2.02/1.6) or will the stockers be ok for my setup?
Also, I've read conflicting opinions on whether to do any porting or cleanup. Some say the vortec heads really benefit from bowl blending and opening the exhaust port around the valve guide, others say not to touch them unless you're going over 425hp.