'65 Barracuda FS 273 4bbl 10.5 CR on pump gas in CA

I have a FelPro head gasket set here, new in the box, probably 25 years old, came with the Barracuda project. It measures .054". I'm leaning toward using it to cut down a bit on the compression and still maintain the stock engine parts. Using race fuel is out of the question for me, I just want a fun touring car that I can pump premium fuel in wherever I happen to be.