I'm looking to finally finishing my 383 stroker ls1 with wiseco pistons #K6464X3903, Darts 225's, 64cc chambers and wanted some suggestions as to which head gaskets to use? looking to spray 200-300 shot, I was looking at the cometic c5745

 

We have always used cometics and never had any issues.

 

Cometic

 

Cometic is good. I used ls9 gaskets with copper spray. Just make sure to tq them properly and re torque after a heat cycle or two

 

Cometic is good. I used ls9 gaskets with copper spray. Just make sure to tq them properly and re torque after a heat cycle or two

 

Been reading about the ls9 gaskets but I think I'll go with the cometic since the 3.910 bore size its closer to the 3.905 cylinder and also they have several compressed thickness available which now I have to decide on that, what do you guys think I should go with? should I go as far as .066 or .075 for a better quench?

 

.075.... opening the quench will open tuning window a little.

 

That's what I read from some of the post you have done, and so I will go with the .075 cometics, thanks for the help...