904 ID question

It's a 998, not a 904. Application is v-6. Come from a Dakota maybe?? It's a 1988 build, like end of January, maybe Feb 1, 1988. May have some desireable internals for sure.
The guy I bought the car from said he ordered a 904 from TCI. It still has the TCI sticker on the case. It was bolted to a 340. Should I just scrap it or will it be OK behind a mild 340?