Fred,
My 428 block is a C6ME, with a 390 cast on one end. The 428 has a bore of 4.13". The 390 and 410 have bores of 4.05". All three were cast as C6ME. I believe that they all can be bored .060" over max. So a 390 bore can come close (4.11") to a new 428, but most 428s are at least .030" over by now at 4.16". According to Steve Christ (How to rebuild big-block Ford engines, 1983), your head (6090G) # is correct for a C3AE, late '63 427 low-riser.
The 390 crank has a 3.78" stroke. The 410 and 428 use the 428 crank with a 3.98" stroke. I don't think that there is any way to distinguish the blocks externally. However, you may try posting to this link:
http://www.network54.com/Hide/Forum/74182
where the FE heads hang out.
Keith