Original motor is by by, i had the dana that i paid $150.00 for so why not? I got the alumn hemi for what i could have bought a mopar crate motor for, and was specked to my wants.I bought this car in 74 when i was 19, and i haven't driven it sence 1978. Execpt for wheels tires and headers it was stock the last time i drove it.So execpt for the drive train and two front seats it will be almost like it was.I don't know, i guess i want my cake and eat it to.I think it may be a one of one,but can't prove it and i'm keeping almost all my original stuff to put back on if need be.