Gasket sets. Pre 1985 and later than 1985?

OK hijacking my own post here. So the parts I was looking at buying were rods, pistons, bearings (except cam) rings and a gasket set. Because the parts were so old I took one rod and piston to my machine shop. after quite some time we determined that the pistons were no good for any decent compression. The pistons were TRW 2380P apparently a hard part number to find for the machine shop but after measuring, talking it over with a couple other guys at the machine shop and some cross referencing they figured the compression would be around 7.25. Not sure if a mistake was made in the calculations but he figured because my block is a 1990 the deck height was different than pre 1985 blocks. (But after I left I was wondering if he was thinking about magnum blocks?) Either way I passed on the parts as I am looking for 8.5-9.0 CR (figuring I can run up to 9.0 safely on 87 octane) We talked about zero decking the block, but then we most likely need to machine the intake to fit and then possibly change the pushrods too. Although I am thinking if the block is a roller and the heads are from 1974 the pushrods may need changing anyway. But to the matter at hand now when looking for pistons should I be looking for pistons for the years 85-92?