Is this going in a car or a truck? I looked at the M50D for my 250 powered Bronco before going NV3550 and was under the impression it is more a truck trans. They have a hydraulic clutch system but back then wrecking yards had lots of them moderately priced unlike the NV3550. I recall they were available in F150s attached to sbf and 300. Have not seen an adapter for M50D to 200 block. If you had the big bell 200 six it might work somehow not really sure.