Putting a 3.9 Magnum in my 1973 Scamp

Seems to me someone wanted to do this swap. Seems to me the engine mounts would be a complete fabrication. I think you will need to fabricate a front sump pan. Depending on what you do for a transmission, I believe you will want the original V6 flex plate---which is weighted to balance the engine---against a so called neutral balance converter. Older converters are not drilled the same, you will have to elongate one hole in the flex plate

I have no idea what you need to do for exhaust, you may have to fabricate headers or maybe even turn headers around backwards. You will need a fan shroud about 75 ft long LOL