From my research, the bottom end (basically anything in the block, not including pistons, and I think connecting rods??) is just like a d16a6...in terms of replaceable parts (oil pump, bearings, etc..) - but I dunno if a d16a6 crank will match exactly to a ZC.
The 86-89 Integras have a d16a1..it may be a close match too. 90+ Integras have b-series motors...
There are lots of ZC parts available on e-bay and places like partstrader.com, etc.