ID'ing Small block main caps
 

Trying to find out what a set of SB Chevy 4 bolt caps came off of. They are orig 4 bolt caps, with the last 4 #'s cast into the caps. Numbers are; 2492, 3482, 3952 and the end cap/thrust bearing surface w/ no p/n on it. Can't seem to goggle an ID and any help appreciated (if anybody needs them, let me know). Thx