Could use a little help ! I would like to convert to a CSP on my A23-24 IO-360-A2B Need to convert engine to IO-360-A1D But I can not find the the 10-Didget P/N for the Bendix S-20 , S-200 Mag. I need this to get the proper impulse-coupling since apperently there is Two OPS. If any one has this engine I would apprecate the help or if some one can tell me the difference in the impulse-coupling. Thanks Dave e-mail