Though it won't go into a Mustang, it'll still go into a Ford. I've got a 72 Pinto in need of a little extra power so I was thinking about rebuilding a 2.5 on a low budget to help it out. It'll also be N/A and I may just change out the auto tranny in it. So how much power can I expect out of a rebuilt 2.5(maybe some head work too)? Another thing, think it'll have any "balls" being in a 2000lb Pinto? The 4cyl Fords are a whole other story for me so I figured I'd try and ask anyways.