B18a question

[DDJIMMY]

I bought a 91 Rex with a b18a swap and was told it was out a 91 integra. I broke the thermostat housing. Went to order another but can't find one that matches. How can I find out what car the engine came out of and what year

 

[invisibledemon]

https://hondaswap.com/reference-materials/honda-engine-list-29128/

specifies which engine came in which car.

if they cant find one by the car, take the broken one in and match it up.