Love that chaparral!! I have two 72 chaps and still get out on the a few times a year. Great shots!!!
The 72 was by far my favorite Chap, with the big open hood scoop and the "snake fang" dual pipes coming out of the front of the pan. Mine had a really sweet running Fuji 400 but unlike Polaris, it had a belt driven fan.
Many, many years after these photos were taken I bought a pair of 74's from a scrapper and actually got both of them back on the trail but for various reasons I wound up selling them.
You're very lucky to have a pair of these 72 beauties.
Also, I think we should all run flags next year