200r4 donor identification?
3OZ 4OZ 5OZ 6KZ 7KZ / 1983-1987 Hurst Olds/Cutlass 442 3.73
4CQ 5CQ 6CZ 7CZ 8CZ / 1984-1988 Monte Carlo SS 305 G 3.73
3BR 4BQ 5BQ 6BR 7BR 1983-1987 Buick Regal Type-T/GN/GNX
These are the perfromance cores. Here are a few more tags that will work in performance swap aplications.
7CT 8CT 9CT 0CT Don't know what this came out of, but this is a nice core to start with. They tend to be a little late into O/D though{like 48-52 mph}.
I love the 200-4r. They are one of my favorite transmissions and converters to build.
Mike


