317 Heads
Thread Starter
Teching In
Joined: Mar 2009
Posts: 22
Likes: 0
From: Buffalo,NY
317 Heads I have a 2005 6.0L LQ4 with the 317 heads that i'm going to be putting in my 71Z28 for street performance/driver. Wondering how much i need to have the heads milled to bring the motor to about 10:1? I have a LS6 intake, 1 7/8" dynatech headers and was looking at a TSP 228R cam for it. My friend is going to do alittle mild porting work on the heads and a fresh valve job. Would like to try to be close to 375-400 motor hp and be able to drive it without problems. I had a racey 406 small block that was in the car, now looking to be alittle more of a driver but not too lame! Also what should i be using for a throttle body and injectors? Would the factory camaro/firebird ones be ok? I don't have either one just got a deal on the bare intake. Trans is going to be a 4L60E and a 2800 or so converter. My rearend has 4.10 gears already which i may leave in or possibly go down to 3.73's. Not looking to get crazy with the motor stuff. Would like a nice lopely idle but still be streetable. The 406 was kinda over the driveable combo. Anything else i need to think about?? Thanks
Thread Starter
Teching In
Joined: Mar 2009
Posts: 22
Likes: 0
From: Buffalo,NY
The LQ9 pistons were totally flat-tops without any lip on the edges? Mine have a slight step up on the outer edges of the pistons. It could be a older motor. I belive the guy i got it from said it was a 2005.
