Pretty easy to figure out, really.
Capcom did use those 27c4000s quite a bit, but it's fully compatible with a 27c040 or 27c4001.
The game used a mixture of 4 and 8 meg chips - 27c040 or 27c4001 for the 4 meg and 27c080 or 27c801 for the 8 meg.
You can figure this out by looking at the binaries - 1024 KB = 27c080/27c801, 512 KB = 27c040 or 27c4001.
CPU Board uses 4 meg at U1H, U1L, U2H, U2L
Sound Board uses 8 meg at U28 and U29 and 4 meg at U30.
I don't have a change log for this one anywhere.
