wow I appreciate the research on all those numbers. Yes the cam is definitely in the category of old school racers. It is not new, but in very good condition. I have new springs with dampers, correct for the lift, all tested myself on a valve spring tester and values noted. As I have read that even trusted names sometimes have variations outside their stated tolerance. Cost prevents me buying new heads. I have 4 mopars all needing attention and cash, I just can't afford to go buying new stuff like that when I can make the stuff it came with work moderately well. And we already discussed the most likely new heads, which would be the base Edelbrock aluminium performer heads, but the 2.02 inlets are too big for this engine capacity and as nm9stheham pointed out might need the block notched to use them. Here down under in my city, parts for these 60s engines are virtually non existent.