Just one point........a US ‘51 GMC would have a GMC 228 engine which is different than the Chev 216. While the throttle linkage might be similar.

Attached pictures of a ‘50 GMC 228 linkage.
Attachments
E7610D59-A681-4756-8314-A59F12C48650.jpeg (247.86 KB, 210 downloads)
E96D62C2-6198-445A-A36B-ECD459DE41AA.jpeg (198.54 KB, 195 downloads)
1E2E79B0-EAF2-406F-BB5E-830080DE8972.jpeg (186.49 KB, 173 downloads)
1640926E-01C8-4480-A545-44C8935E131F.jpeg (203.27 KB, 171 downloads)

Last edited by showkey; 03/13/2020 1:13 PM.