1969 427 info needed L-88??

[HEMIBEE]

Hi guys, I was at a swap this summer and found a 427 engine for sale, the owner claimed it was in a corvette that was smashed in 1970, i bought the engine (short block) and after looking at it, i seen it had a 7115 crank dimple rods and some very high compression pistons, the block is 4 bolt main with the windage tray, casting #3955270 no prefix at all no vin it is a late 68 date that was balanced in early 69 (engraved on crank) just wondering if this is a over the counter engine?? vette only?? L-88?? any input would be great thanks Rich