looking for head identification

ok guys, i found it. I had to take off my intake manifold and turn the engine on my stand, and I found the casting numbers underneath the head. the numbers are 4343475-A. can any one tell me the specs for these heads. Im guesing its 1.88 int. 1.60 exh. and a combustion chamber of 70 +/- 2 which would put my cr at 8.0 to 1?

I am going to use this motor and heads the way they are. I will also be puting on a performer intake and edelbrock 600cfm carb. could I get some opinions on a cam upgrade that would not require a valve spring change.

I will be putting a paxton supercharger on it in about 8 months. which cam should I go with. thanks