Small block Chevy is easily the most prolific. Heck, they put them things in every thing!
For longevity and taking abuse, I’d go with the Chrysler slant six though.
Oil? That was for sissies! My buddy run one 2 quarts low for thousands of miles.
In 20 years of junkyard/salvage sales, we only ever sold one for replacement.
If you ran them hot for a lonnng time, you could cook them into locking up, eventually.
I don’t know of anybody else ever destroying one. Those things were tough as anvils.
Reon


"Preserving the Constitution, fighting off the nibblers and chippers, even nibblers and chippers with good intentions, was once regarded by conservatives as the first duty of the citizen. It still is." � Wesley Pruden