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

I've been researching this very thing. So the service manual says that 0.028" compressed thickness was stock. And according to summit there is one that is available for a small block Mopar in 0.028" compressed but the few reviews it has tells a tell of leaks. Personally I'm going to run a felpro at 0.040" but I'm also running the comp 270 cam which has a tiny bit more lift and duration than stock. Hopefully it matches up well.