hello from New Zealand, 18 spline head ache a833.

67Dart273 said
Depends on if you want an overdrive final gear, and yeh, they were some weaker. What Mopar (and others including Ford) did was to essentially turn the 3/4 shift lever upside down, so that the shifter treated the old 3rd gear in the gearbox as 4th gear, AKA the OD box shifted the actual gearbox 1-2-4-3 as you moved the lever 1-2-3-4

Sound like it is a conventional "straight through" 4 speed. That input shaft is weird.

ok so its not a total lemon, i understand what you mean about the 1243 and 1234

the tail housings are pretty much the same also

If i could make the snub an inch longer I would be sorted ! have you heard of people full prep the end and welding a extension to the end ?