I'm running 9.5:1 compression with open-chambered iron heads with no quench and it is running fine on 91 octane pump gas with no pinging. I run it hard and race it on the 1/8 mile whenever I get a chance with no problems.

I plan on swapping on some Stealth heads when I get some more money and time and I think it will run fine with the smaller 80cc chambers and higher compression.

If you get some TRW 2355 pistons that will get you close to zero deck and give you a workable compression ratio with the Stealth heads. Lots of people are going to say these pistons are too heavy, maybe there's something else someone can recommend that is as reasonably priced that will get you close to zero deck and a good ballpark compression.