dont forget about detonation. the only way to address this is with water injection or a lower compression ratio.
you cant turbo much over 6 psi with 8.5 or 9:1 compression ratio. inlet temps are too high. if you do a drawthru you cant run an intercooler -only with blowthru.
you can lower compression by making the chambers larger, dished pistons or multiple head gaskets. unfortunately the recipe for naturally apsirated hp is the complete opposite for turbo applications
puttin out lots of boost (and ponies) will require forged pistons as well. pinging on cast pistons will blow a hole thru the top of the piston. not good!!
you can run a turbo with about 6 lb of boost with no ill affects. pick the right one, it will spool up fast and just add to the already great low end torque our sixes have. it depends on your altitude. sea level is 14.7 but like here in denver(5280ft) its 12.2 so running 6lbs is like 1.5 times the hp.
i am planning for a holley 390 on top of a OZ head, forged dished pistons, intercooler up front of the radiator. looking with only 9psi 260HP!!! there are guys down under getting 346Hp out of a 250 with 20-30psi of boost.
there is a website/forum i found. it even has a tech section for forced induction!! it is . . . . waiting huh
http://board.performanceforums.com/foru ... 02f1ba5383
(thats what is in the address window). i have it saved to favorites so it just opens there
hope this helps!
Pete