Ok thats a GMC, not a Detroit. Thats where they all came from. Now this thing is gonna have to be converted to gas. You'll have to machine the case, put in high speed bearings and double lip seals. You'll also want to change the rear bearing plate to aftermarket, you can build a block off plate for it but they're usualy fugly. There's also two oil drain holes in the front you'll want put 9/16 softplugs in. Thats pretty much minimum, skys the limit from there....who ever buys it
