I have a 123 in my 71 and it is a big improvement over my worn-out? Marelli. However it's the older version where the curves are chosen by removing a plug -in the bottom- of the distributor, and then rotating a switch. This means that you have to pull the distributor to change the curve. No a big deal once you've chosen the right curve and decided to stay with it. Still, if you like to play, and I do, I think I'd recommend the newer model with the USB port -in the side- where it's accessible.