I acquired a 66 2 door at Christmas last year. Just barely getting started on it. Mechanically, seems pretty good. Still having issue with exactly which small block I've got. There is a tag on the front of block from Pacific Coast Auto, showing cylinders bored 30 over, rods and main at 10. Now, I've been in a small argument with a mech here at work, who swears that you cannot get over 300 hp out of a small block without using turbo or supercharging. Any truth to that? Again, just getting started, not planning to do anything like that, just a cruiser!!