I have been de-greasing the underside and trying to pull some numbers and see what is original and what has been added along the way.
I know my motor is not original and came from a 61 chevy.
I'm pretty sure that the trans is an SM-420, #'s are ([CON 5, 12 GM, D133, 591953] all on drivers side) and GM II, 591668 on top passengers side. I can't seem to find a date code unless it's D133, but if it is I an't seem to decipher it.
the Differential #'s are as follows if viewing from back of the truck. Bottom of divers side, US. PAT. 2018188. Bottom of passengers side, 80. Top of passengers side, C30255. Top of drivers side, US. PAT. 1338618. Tag on bolt located at the bottom of the drivers side, 41-10 4.10. Also differential had a white X painted on the cover, It was maybe 3x3in, it was painted on, does anyone know what that means? (pic 1)
The trucks rear end is pretty tore back, the shock absorber mounts, and drivers side spring have been welded in (with pretty ugly welds) the passenger side spring looks to be original welds, and a cross-member of the frame is peeled back like 5-6in >.< I'm wondering if that stuff is repairs or if it has all been swapped out with another trucks drive-train.
Thank's for the help in advance
