I don't think domestics were creating reliable 4-cylinder overhead cam emgines in '78. Foreign companies have much more experience with modern engines. I'm not saying a Chevy 350 of and Olds 455 aren't reliable. But even when domestics went to fuel injection systems, they were putting in the TBI's, while foreign already had MPI. They enjoy a similiar lead in hybrid technology, while GM keeps cranking out Suburbans and Hummers.
Domestics may have been a little more resistant to rust than foreign.
Fortunately, I don't have one of the newer Trail Blazers with the piston slap issues. I've read that Blue Book value takes a $5000 hit on this issue. To be fair, Toyota had issues with this too.
I can change out a fender on a 4runner in 1/2 hour and it costs $70. Plus I don't waste my older 4runner in the winter salt. I have a Blazer for that.