I am putting mine back as original. I located a 70 318 out of a barracuda just yesterday. It has the correct exhaust manifolds and intake, the carb will be different since it is for n automatic. It was complete and the crank even drilled for a 4 speed. I have the original hood painted, the original 14 inch rims and hubcaps. I also have the original am radio right here. I have to take the red bar out of the grill, put the non dual exhaust pan back on, and do the mirrors back chrome. I still have the original 8 3/4 and also the original leaf springs. I do need the reverse lock out from the trans to the frame. I only have to unsplice the harness for the coil extention wire since I put the 6 pk on. Oh, and take the road lamps off, then finish the door jams inside with organgosol, which I have mixed already. So mine will be pretty complete. The trans is a 70 e body small block, but not original to the car. I still have the original voltage regulator and ballast resistor too.
This about as original as i can make it. I just procured another ebody to start thrashing on today.
I got the engine off of four40cuda member thanks so much