Hey all. So since I blew up my LS1 (spun bearing), I have a low mileage 2001 LQ4 to go in. Since my LS had 853 heads I plan on keeping my 317s with the LQ4.

My question is my cam specs :
Adv dur : INT : 281 EXH : 286
Dur @ .050 : INT : 231 EXH :234
LSA : 113
Valve lift : INT : 617 EXH : 612

Using Brian tooley valve train.

My question is id like 10:1 - 10.5:1 compression instead of the 9.5:1 these heads currently have.

If My math is correct
Milling these heads : .035 get me ~66cc volume and 10.1:1
Milling these heads : .050 get me ~64cc volume and 10.5:1

My main question here is with my cam, and above info would either of these give me any PTV clearance issues, manifold fitment issues or any other unforeseen problems?

I'm leaning towards .035 and MLS stock gaskets.

Any advise would be great, heads headed for cleaning and possible milling based on this thread this week!

 

Ttttt