You could find out a lot by doing a cranking pressure test. If you do one make sure to open butterflies on the carb fully. You should have at least a 160 pound per cylinder compression. I think your going to be a lil lower though with that CR and cam. If you set up a good quench you could run up to about 185lbs to be on the safe side. Motor willbe sluggish without a good cranking pressure.