1972 dart 360 with 904

Give us the casting date off of the 360 and the PK part number off of the transmission pan rail right underneath the shift and kickdown levers. If the 904 originally came behind the 360, it would be a 999-Good For You! and it would have the correct weighted convertor behind it. Since you stated you wanted a stock style convertor. Chrysler started using the 999 behind the 360-2 barrel engines in 1974 in the bigger cars, like the Cordoba and such. They used them thru 1979 that I know of. Starting in 1978 they could be non lockup or lockup, and 1979 lockup only. So 74-77 were the good years for the 999 transmission. Does the convertor you have, have weights welded on it? If so-you have the correct convertor. If your convertor does not have weights, you need a B&M 10239 flexplate.