6.0ltrS10

iTrader: (2)

Hi, I'm building a forged 370 and going big single or twins. What is the best stock head for boost? i'm gonna try and set the C/R to around 9.8:1. Would the stockers need larger valves for this FI setup?

HydroStream6

iTrader: (16)

243s for that setup. 317s are the same thing with larger chambers. You could use either depending on your piston. What are your goals?

6.0ltrS10

iTrader: (2)

car is 81 malibu, I would like to get 800whp or so, more if needed.

NemeSS

iTrader: (127)

317s work well. with studs.
AFR are some of the best aftermarket heads for boost. due to ther thcker decks.

HydroStream6

iTrader: (16)

While 800whp can be done on stock heads, if you want it to be reliable and may want more in the future, I'd look into something like AFR, TFS or the like with a thicker deck.

93formto98T/A

iTrader: (28)

I second the aftermarket head/thicker deck which is better for boost apps. But to answer your question; 317s are your best best for factory heads and boost.

6.0ltrS10

iTrader: (2)

Cool, Thanks for the info. Just got off the phone with a buddy that's a World Products dealer. are the Warhawk LS heads any good? He can get me a heluva deal on bare castings right now. He said to go with the 235's or the Warhawk ls7 12* head. What do you think?

gnx7

iTrader: (28)

you can get as cast TFS 220cc heads for around $1650. Get the LS2 version which are designed for larger bores. They supposedly make 10rwhp less than the fully CnCd versions.