maybe a s-10 4x4
3:42 or 3:73 can be found
g-80 is posi gt4 373 & gu6 is 342
These are the codes found in the glove box door
i used one in my 52 Pontiac


Regards,
Lindsay

1958 GMC Canadian 9310
In the Stovebolt Gallery
More pix on Photobucket