I do have a 1989 Cummins with 727 trans and need to have an OD Transmission. I know there are some Diesel 518 out there but rare to get one.
I might get A-518 Gasser 46RH Transmission and was wondering if you can morph those two. Using the front/main case from the 727 with the cummins bellhousing and the tail and all internals from the Gasser 518? Obvioulsy would need a Diesel Converter due to the different splines and as well the governor from the Diesel.