ID, try this link...
http://www.mrgasket.com/lakewoodmain.html
It looks like a Lakewood scattershield. this link has photos and part numbers. Yours looks like a 15201, for '79-'93 small block (including the 351C), for the small input toploader, Ford Borg Warner T-10 and Richmond trannies. If it still has the tag on top, it should have their part number for verification. Lotsa luck...