NNK20
Junior Member
- Joined
- Dec 3, 2024
- Posts
- 2
- Reaction score
- 2
- Location
- Minnesota
- First Name
- Nick
- Truck Year
- 1979
- Truck Model
- K20 Cheyenne
- Engine Size
- 350
Hey everyone, longtime “guest” reader here and I have learned so much from here, so thanks for having an awesome forum. I have a 1979 K20 with a 400sbc, TH400, NP203 that I am working on. Unfortunately the SPID is missing, I’m in the process of ordering an RPO list for the truck. The truck appears to have its original axles and does have the larger JB7 brakes however it’s a 6800 GVWR. I’ve read before that JB7 was a “heavy duty option” that could be ordered with the 6800 GVWR trucks but I’m wondering if anyone else has ever heard of that? Thanks for reading and I appreciate any help.