A year or so ago I purchased two Jerry Snow Accurate O Scale drives on eBay to repower 1980's vintage Sunset ALCo PA1/PB1. The drives are powered by Pittman gear head GM8724F217 motors via a toothed belt drive and are extremely smooth running. The trucks, gearboxes, and frame are Overland/Ajin - early production as they are set up for center tower through the fuel tank drives. The much improved late production Overland/Ajin drives used a pair of truck mounted tower gearboxes. I've attached photos of the Jerry Snow Accurate O Scale drive and the Sunset body's I will be installing them in.
I'd like to consider repowering a 1960's vintage USH/KTM GP-7 with a drive like Jerry's. Does anyone know if drive components are still available from Accurate O Scale. My Google search showed Jerry to be the previous owner of Accurate O Scale. Contact info for either Jerry or Accurate O Scale would be appreciated.