Well what I plan on doing is getting some LS6 heads from Patriot to raise the compression and keep the added flow, since the LS6 are exactly the same as the 317s but with small cc chambers.

 

So having my 5.3l heads CNC'd and PP and all the other good headwork goodies wouldnt flow as good as the 317's?

 

found a 6.0l in the classisfieds here with water damange for 650 plus shipping. He said it ran but a littl rough. Could the block be damaged at all? As long as the block is good I think i would be alright for my plans deffinately since im getting such a good deal at 650.

 

No. The combustion chambers on the 5.3 heads are too small for the larger valves with out runing into shrouding problems.

 

ok SO head wise the best way to go would have the 317's worked over? Or can I still use the 5.3l heads someway since the higher comp with help N/A

 

Thats still what Im trying to figure out....Is the extra compression worth the loss of flow, and vice versa? I do know a few people running the 5.3 heads on 6l's though and they seem to be strong.

 

your really confusing me. You just said I would run into shrouding problems running 5.3l heads on the 6.0? But then said you know of a few people doing it?