Want to put a magnum 5.9 in my 70 dart.

The company PRW sells what’s needed. I got one for the wife’s car and it’s SFI rated.
Do you remember the part numbers? I have looked at PRW stuff and don't remember seeing Magnum balance. Some of there stuff is listed weird with the title saying FORD and the details and picture showing Mopar, but I still don't see it. I hope I am just missing it because that would be a better cost than the companies buying one and modifying it at a higher price.