I'm not sure what it was originally mated to. I purchased it as a engine/trans combo. PO had it mated to a 350, which I put in my 41. Trans has everything needed to bolt up to the 350: bell housing, clutch and pressure plate. Also has trans brake in tact.
If you let me know how to tell what it was originally mated to, I'll go see if I can find out.
41 3/4 Ton Pick Up (in process) 55 Grumman Kurbside (Doughboy) 235/3 on tree w/ OD 57 3100 58 C4400 Viking (Thor) 59 C4500 Short Bus (Magic Bus) 59 G3800 1 Ton Dually (Chief)
Be sure to check the ratios (especially 5th) on the gears as it may not be an improvement or upgrade for a smaller truck. I think they were designed for bigger trucks hauling heavy loads with the same 90 hp engines ... an extra gear with closer shift points is better at getting a heavier load going than an sm-420.
"Of all tyrannies a tyranny sincerely exercised for the good of its victims may be the most oppressive." — C. S. Lewis
Check the rear face at the bottom for a stamped date code...
The GL was the standard issue trans, the GD is the close ratio. Put the trans in first gear and turn the input shaft and see how many turns it takes to make the output turn one full turn. 6 turns = GD and 7 = GL.