I'm running 11.85 comp. with shitty 91 onctane out here in CA and it runs fine. There has been a few times where i've thrown a splash of 110 in the tank when it was over 95* and i knew i was going to be driving the **** out of it. but that's just for peice of mind .

 

Where do you find 0.03 cometic gaskets?

 

in order to run .030 cometics your pistons woudl have to be inthe hole a bit or you will hit the heads at even amoderate rpm