Wow, a lot of good points here.
The 75 does not have a cat, I had forgot that 75 did come with a cat. This one is long gone.
I went today and drove the 75, I really think it runs good enough that a little bit of maintenence will keep it going. I went on the highway and the guy was acting like a chicken and said to stay close in case of break down. (Not a good sales strategy) i did not baby it because I was hoping If it broke down, it would do it with me instead of anyone else. It's cold here and the heater actually works and got the car toasty, after blowing a lot of dust and leaves.
Kinda weird that the more I drove it, the better it seemed to run. The interior needs help, it's a trash can on wheels, I think the taco bell wrappers in the trunk are a few logo styles back.
Based on the replies I recommended he get the 75 because he can use it now and there's still plenty he can do with it.
He has no later car hate like some of us who have been around these cars much longer.
I also like that it has electronic ignition, I personally have had great luck with factory ignition parts. The 72 has points on it which would need upgrading. Even i don't mess with points, why, when you don't have to. I do keep a points dizzy with me when I go real long distances as well as spare ignition parts. (You can't get this stuff at auto zone anymore without ordering it)
The more I looked at the 72 the more I think it's a level 4 model kit, it's fixable but going to require a bigger budget and more things need fixed before it's even decent.
