Super Stinson Kit - Pricing information The basic conversion kit which includes the STC, engine mount, cabin air systems, engine baffling, controls, battery box, manifold pressure gauge, cowling modification parts, air ducts, gas and oil lines, electric wire, and general hardware. There are over 700 individual parts in the kit and it is priced at $6,250.00. The spinner is priced at $950.00. The exhaust system is priced at $2,650.00 You will need to provide: * Your Stinson model 108-2 or 108-3. * Continental 0-470-K, L, or R. * Propeller with governor. * Approximately 105 hours labor.