REV-N-NATOR - Thoughts?

The person that I sold my '74 'Cuda to had someone work on the car afterwards. I think they sort of ripped him off. They convinced him to change cams to the exact same cam I had put in it a few weeks before and they removed the REV-N-ATOR and installed an MSD box instead. I know I hadn't gotten everything dialed in yet but the only REAL issues I was aware of were carb and timing related. He's got the box sitting on a shelf in his garage and I'm sure if someone's interested I could get it for much cheaper than a new one. I doubt it has 50 miles on it. The guy is not very mechanically gifted and tends to farm all work out to others. So whatever the flavor of the moment opinion is that he hears, he tends to go with. It's probably the best deal anyone's ever going to come across on a virtually new one. I'm running MSD boxes on all of my other projects except my 'Lil Red. - And I'm trying to keep the Express all original. - Otherwise I'd buy it myself.