Engine Brainstorming

I would think that you would want to get the compression up to about 10.5 to 1. A cam with a total lift of .512 using 1.6 rockers and duration in the 235 range should be enough. You can probably do it with the intake you have if it's an M1 and still retain the bottom end torque, if not, an Air Gap would be the way to go. A carb in the 750 cfm area would help a lot. Maybe a 780 Avenger.

That should get you pretty close.

Jack