John.... To answer your questions....all TF 727/904 AMC flex plates are the same....only the balance weight is different to match the size of the engine.....there are two sets of bolt holes....outer set for large converters and inter set for small converters....I am using a HD 10 inch converter which has 7/16 bolts vice 5/16 which is stock....so I have to drill out the inter set of holes for the larger size bolts.... this is all true except for later Full Size Jeeps with 360's....Chrysler changed the flex plate. to use a different starter....same as a 4.0 I think..... A friend put a TF727 behind his 343 with the adapter kit...he had his engine internally balanced so we used a 258 flex plate with no weight added....worked great..... Jim S. _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list