shownshine55
Newbie
I am running a 355 with flat tops. This was going into another project that had 76cc heads on it. Now I want to put on a set of reman vortec 350 heads and use it in my '96. Gas in our area is rated at 87, 89 with 10% ethanol blend, and 91. I always run the 89 because it is the cheapest. With doing some research I'm guesstimating that I would be running around 10:1 compression. I'm thinking that if I run a thicker head gasket maybe I can get the comperssion down to where I can run the 91. Any suggestions?