I have a 1991 F-150 XLT Lariat 4X4 that I got out of North Carolina and it currently has the 5.0L engine. It has never really had much power and has also had a piston replaced before. I got a 1990 F-150 pickup, (not a 4X4) and it has the 5.8L engine. I was told it is a windsor. Both are automatics, and I am wanting to rebuild the 5.8 and place it in my truck. If I am not mistaen, the transmission bolt pattern is the same, and everything else is same except piston size. Is this possible to swap these engines and use the 5.8? I have the complete truck, and now would be a good time to keep what ever else I may need. Any thoughts or suggestions are GREATLY appreciated!