I've already seen the threads regarding the fuel tank differences... 88 spec: large sender hole. 90 spec: small sender hole.

My car is from 1989, and the whole car is 88 spec. BUT it's build date is May 1989, and the seller told me this is the exact month that they changed the tanks.

Since atm I do not have any chance to remove my old tank and check for myself, can anyone confirm that if my car is an 88 spec, the tank is an 88 spec as well?