I have a 302 based engine. It is a mexican block. I have a main girdle on it and forged internals. I know of the limitations of a stock standard 302 block but whats the limit with this combination? I was wanting to run 8.5 limited and already knew I was taking a knife to a gunfight but If I can keep from scattering parts everywhere that would be great. The engine dynoed at 640hp before the heads were ported so is it tapped out or can I spray a little bit? Thanks for any help.