Bb Chevy Heads?

[CHUBBY2]

Help, I need to find someone that can tell me the intake and exhaust valve sizes that are installed in the following heads.
casting # 3931063 closed chamber date code D11-9
casting # 3964290 closed chamber date code H20-9
The heads are virgin rebuildable as removed oval port. Are there any differences between these heads except for cast #'s and dates?????

[86cutlass]

Originally posted by CHUBBY2
Help, I need to find someone that can tell me the intake and exhaust valve sizes that are installed in the following heads.
casting # 3931063 closed chamber date code D11-9
casting # 3964290 closed chamber date code H20-9
The heads are virgin rebuildable as removed oval port. Are there any differences between these heads except for cast #'s and dates?????

how do i tell what sizes my heads are?

[grunch]

both # are same applacation. 396/402, 325/350 hp, 100.9cc, 206 intake/172 ex.