Hi everyone, I have an engine that was used to run a emergency water pump for a town. On the casting above the fly wheel is the numbers 11433, and the heads have 81T-LH and 81T- can't read it. It has a 11 inch clutch disk on it, and the fly wheel is drilled for the pressure plate bolt holes only. (no other drilled holes). I have a 32 transmission to go behind it, and my question is, will a pressure plate and 9 inch clutch fit on this fly wheel, or will the fly wheel have to be re drilled and tapped for the 9 inch plate, or do I have to change the fly wheel? Thanks for any help.