PRW SFI BAlancer P/N 2431841 which balance weight.

I just got the same converter for my magnum build, thanks for the info! What key did you use for the crank? I bought a short block and don't think it will come with the crank key... is there a specific PN or would any that I can make fit do the job? Worst case scenario I can get one from the junkyard I guess...