I would have to disagree. Finding a mechanic who is comfortable or familiar with working on an 80 series is rare.
I would rather be pulling into a small town in the middle of nowhere with a blown head gasket on a LS motor vs the 1fz fe. Parts are available everywhere and every professional mechanic in the country has plenty of experience on LS motors.
I was mainly going on about another failure as ZetheGSD is saying. If you have a mechanical failure you're kinda boned either way. Most of my failures in the past have been weird short, or some other random crap something i would believe was easy/easier to find since it was all stock vs a mangled mess.
I'd imagine having a swapped motor and god knows how it was swapped and you have some failure you're pretty boned finding a shop to sort that out, out in middle America. But I do get your point motor wise.