Some factory C10 equipment Q's

[Mrturner1]

Hey all I have a 1970 C10 LWB 2wd and the PO did ALOT of changing things around. It currently has a 355/th400 and the rest is stock factory running gear which I'm trying to identify today. There was definitely a manual transmission in the truck at one point, the crossmember for that was cut and you can still see the part bolted to the frame. If it was a manual trans from the factory, wouldn't that garauntee it was also an I6 motor? And if THAT is so, would that garauntee that it's a 3.73 rear?

I was under it yesterday chasing a bolt in exhaust system rattle, and I started wondering about drivelines in these long bed trucks. I've never seen a LWB truck that had a one peice driveline. All the ones I peeked under had those two-peice drivelines that were connected at a round cutout in a crossmember. Are there factory one peice drivelines in 1/2 ton LWB trucks?