Quote:

Build a 9:1 400 base aluminum head 496 and you can make your goals on 87 regular. Not sure if this will be the hot set up for an autoX but if compared to an all iron SB maybe not so bad.

My 440 based 493 came in at 8.97:1 and it makes 500hp/600ft/lbs all done by 5500 and it does fine on regular. Over 500 ft/lbs from 2000 to the end.

Kevin



do you have the build specs for this?
I know its a loaded question but what all determines compression? i know your piston and heads help but I would love to get the numbers I want with low compression and running on 87 or 89 octane:)