GL: Transmission may be a Clark 267 V. 5 speeds, with 2 thru 5 syncronized. Uses an 11 inch clutch disc and heavy duty coil spring pressure plate. Was usually in larger 70, 80, and up series GM trucks. Also usually set up with hydraulic clutch/special bellhousing with fork/slave cylinder on starter side. The countershaft sits directly below the mainshaft in the case. Also about 2 times the physical size as the SM 420, weighed about 175 lbs. Has large imput shaft, about 1 5/8 inch 7 spline I think. Had six bolt PTO mounts on both sides of case. This could be it. May also be a Rockwell trans as they were special order items to IHC, GM and F%$#, in the larger 1.5 to 2 ton 4WD units Don't know about the website. You;ll have to research this one!! :confused:
