Just found and joined your group. I recently bought a 93 K1500 Silverado, and C20 Cheyenne off the local Facebook trader.
The Silverado has the 4.3 V6 with the 4L60. The Cheyenne has the 5.7 350, with the NV4500 5 speed.
Both need a lot of work! So, I hope to learn as much as I can here...