I will be glad to measure things, and scan it for you. This will happen tomorrow unless someone beats me to it. This appears to be a Chevy, as opposed to a GMC, as it has the shifter bolted to the doghouse. Because the GMC is designed different with a split seat and shifter between the seats, I doubt the seat riser is the same as a Chevy. The seat itself will be the same as any Advance Design but the seat base, as well as the riser are different. In your picture the base has a rearward central indentation along the front edge, to allow the shifter to pass to the rear. If you can weld and fabricate you could take a normal seat base and modify the front edge and shorten the central brace.
Kent
Last edited by Lightholder's Dad; 03/03/2019 2:07 AM.
