904 vs 727

stick with the 904... have some one that know what they are doing do a quailty rebuild with a shift kit in it and it will be god to go... it has to be a small block 904 if its goingh behing a small block. IIRC in the earlier ones (i forget what year it changed) the input splines were different . you want the later one is what you want for more and cheaper converter choices.