Hey guys, does anyone know what the distance is from the rear of the valve cover to the firewall. I read in wellys track car build there is 10 inches from the engine block to the firewall, not sure if its the same measurement at the top. I am putting a tubular top mount manifold together and with the turbo fitted I have measured 9.1/4 inches. There is space to move the turbo forward by about half an inch if needed. What do you guys recommend?