Getting fed up of high-perf , being happy with less

We always drove our cars a lot. My brother put a 300,000 miles on his 67 Barracuda with A/C, I only put about 250,000 on my 64 barracuda and about 100,000 miles on the 68 original 383 fastback. Both the 66 and 67 have 273's, mine high performance, his stock 2 barrel with a 340 TQ and both would get into the 20's mpg on a highway trip. Lots of great stories. Take them anywhere, cross country, over mountains, cruising for days at a time. I also have pretty much had it with being the fastest, the latest suspension, or the biggest brakes. My friends drag race. It is nice going with them, but it is too much time, equipment, and money for me with what gain? Yes, the 66 and 68 have Kelsey-Hays disc brakes, the 67 it has 11 3/4 pin type discs, and all have an 8 3/4 rear. They were the best all around cars then, they still are great cars. I have always liked working on cars, but I hate having to work on them.