ID 4spd OD????HELP!!!!!

is 23 spline, is od, does have 5.125 brg front shaft, but notta on numbers, probably 74-75 yr cant make out 4 sure, is tight and removed sideplate and is clean and everthing seems to work smoothly,no loose wobly shaft or gears or wear present, guess i'll list it on parts 4 sale or trade--$150...is all cast iron no alum...is a body...thanks all.