As a fellow owner of a 70 U code Charger: do it.

I've been running the FItech EFI with a tanks Inc/Walbro combo, and it's one of the best mods (if not THE best) I've ever done to it.

It's easily reversible if you change your mind later, but after getting spoiled to the perks and reliability of EFI, I don't know why you would.

Go for it.