Pimpium57

iTrader: (104)

I'm just starting my research as I plan to go the turbo with one of my F-bodies over the winter. Haven't decided on single or twin, but will be between a 370-408ci motor. How far can you go with the 317/LQ9 heads?

ChevyChad

iTrader: (50)

what is your definition of 'big' power? I don't think 700rwhp would be a problem at all for stock 6.0L heads with an upgraded spring set.

Pro Stock John

iTrader: (34)

I went 9.4@143 with ported 6.0 heads. They could definitely go in the 8's but I pulled mine since the porting is through in a few spots and I didn't want to worry about the heads at my current power level.

Quik

iTrader: (7)

self-ported? and what motor? thinking of using a set of "clean'd up" 317s for my TT408 project

Pro Stock John

iTrader: (34)

Ported by someone for Diamond Racing... On my 8:1 348ci. I had them professionally epoxied where they broke through, I might sell them or keep them for a future car.

black98ws6ta

iTrader: (77)

I made 920 rwhp on bone stock 317 heads with just patriot dual valvesprings. Car went the numbers in my signature at the late part of last race season..it had more in it.

IMO, at those power numbers a thicker decked head(aftermarket) will help with head gasket sealing.

y2khawk

iTrader: (5)

had them on my POS when it went 8.20's

nitrorocket

iTrader: (12)

Yup, and that was close to 1500 hp!