I have a zz502(9.6cr) with a erson 288/296,.610 114cl cam. I am putting on a B&M 250 at around 4-6lbs on pump gas and I have a pair of aed 850 I would like to use. I know they are big but I would like them to work since i have them. What jet sizes should I start with? I plan to boost reference with power valves. Also, is there head gaskets I could use to lower cr a bit?

Thank you