Those big block high compression V-8s were absolutely great engines. I sold mine in 1973 to a Mexican in San Antonio. The water pump had started making a noise but he knew it was an inexpensive repair.
It had over 250,000 miles and did not use oil. All I ever did was change the plugs, oil and filter plus replace the AC compressor seal. I think I had to replace the alternator once but can’t think of another repair in all that 250,000 miles.
The positraction made a noise for the last few years but never tore up. The one thing which was surprising was how nimble it was. It really handled well plus would run almost with the true muscle cars.
My uncle had a 1968 Wildcat. He was retired and sold travel trailers part time and he owned one as well. He took great care of his ‘Cat. I asked him once how many miles to the gallon (OF OIL) did he get?
He said he never had to add oil. Except when he changed the oil. Which he did every 1,000 miles.
“What? You change your oil every one thousand miles?”
He did. And he never had engine problems.
I remember another friend of mine. His parents had a 1969 Buick Estate Wagon. They used it to pull their Airstream.