LS #317 heads

[fastredgmc]

ls series #317 heads
fresh 3 angle valve job
resurfaced
new seals
stock springs
never bolted on since being machined
$300

 

[drw_walters]

do these make power over stock?

 

[Fryguy302]

do these make power over stock?

Yes they do. They have the identical ports and valves as the 243 (ls6 and ls2) castings. They do have bigger chambers though, so compression is lower. They work good for boost.

 

[1BADAIR]

yep.. great stock head for boost

 

[OnyxSSS]

search on the truck sites, Performancetrucks.net
alot of guys get rid of them...I just gave mine to Raj

 

[prorac1]

What size is the chamber on these? Around 69 or 70 cc IIRC. We are building an iron headed 6.0 and are looking for a good head to compliment the stock bottom end. Could these be milled down to 62 or 63 cc and still mate up fine with a stock intake manifold. Thanks Eric L