BBC HEAD QUESTION!
 

Is there a bbc head that I can put on a stroker that has Aries dome 13:5 pistons to lower the comp. enought to run 92 octane? It is a fresh motor Dart Big M block etc. that is a torque monster and I don't want to take it apart to change pistons. Right now it has Dart 320 heads that flow 369 @ 800 lift. Its an excellant setup that I just can't get sold so I might as well run it on the street. This is my first BBC I always ran Pontiacs and this has been quite a learning experiance, and $$$ too! Any advice /help would be appreciated.

AV gas or racing gas , the only way you can do t.

JMO

Zip.

bbc compression
 

I agree

you could run e85 has its pros and cons but i believe you can run it with high compression

No, the only way to get the compression ratio down far enough to run it on pump gas is to change the pistons. I'd shoot for a max of about 9-9.5:1 with aluminum heads. That will allow you to get a bit more aggressive with the timing. You can go higher, but quality of fuel becomes an issue. Just my $.02