Hey Guys, I bought a nice Chippy at a swap meet recently. It was built but an engine had never been installed on the engine mount. Im not sure how far I should place the engine from the firewall. I don't have the plans, and I could just eyeball it and mount the engine on the motor mount. Does anyone know what the Goldberg plans say about the distance from the firewall to the prop hub where the spinner back plate will snug up against? Any input would be helpful in advance.