I've searched for a few hours all over the internets only to come up short on what engines are interchange'able. I've got a stock 89 civic dx w/ the D15B2 and I'm just curious what other engines bolt up to the trans, fit the engine mounts etc.

thnx for any good knoledge anybody can give.

 

I dont think you were looking that hard https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/88-91-crx-ef-civic-frequently-asked-questions-faqs-1508680/