New guy here. Just got a 1974 K20 2 weeks ago. It's all original with the 350, th350, np203 combo. My grandpa bought the truck new, so I'm excited to have pass down to me. Now I'm going crazy trying to get it back to perfect condition and tinkering with it, along with a few upgrade and safety mods. Already found a complete '77 K10 donor truck to use for parts that has a 400, th400, and np203. The donor truck should be here soon for my backup parts and future motor upgrade once gone through.
I've been lurking for awhile on this site and it appears nice. Looking forward to swapping stories and knowledge.
Added a picture. Don't have a good side profile shot quite yet. Still has the split rims.