So I have a 1980, K10 rcsb Silverado, TH350 with lockup, 205 transfer case. Glovebox says it's an "HD" transmission, what will my transfer case input shaft splines be? I wanting to convert to a 6L80e transmission.
In the post it isn't clear but looks to be 27 spline:
"27 spline (from Turbo 350...