CR is the engine code, as in one of those old creaky 11mm blocks. Yes I know about the current best practice to buy studs, but I started this business 21 years ago before anyone knew better (Al Gore hadn't invented the internet, can you imagine life before forums like this?). I haven't ruined a block yet, and I have already torqued the head to final value with no obvious ill effects. Do I feel lucky? Youbecha..
'94 is when I bought this block (probably manufactured around 1981) as an assembled shortblock. Evidently the MOFOCO morons didn't center the thrust bearing as it eventually ate up its crank. I rediscovered it and thought I would put it to use. (Actually, billybobf, it contains the O/S pistons you sold me via theman53 about three years ago...when you retire eventually projects find a way to get moving)