My purpose here is twofold. I am in possession of an 1985 Mustang GT 5.0 H.O. The car currently belongs to my son, who has lost interest in it after pulling the motor 5 years ago. I am vintage, and so is my 1967 GT Fastback. I am trying to decide whether to rebuild the engine and install it or sell the car as a roller to get it gone from my barn, as he has moved out and moved on to other interests. I am here to try and figure out the ins and outs of a rebuild, particularly the Windsor firing order and flywheel weight considerations.