Rod Millens retrocruiser had an entire UZJ-100 under a 45 body. That sure wasn't putting a V-8 in an old cruiser, more like spending upwards of $100,000 to put a old cruiser body on new chassis.
Not for reliablity for sure, but for the price I could buy a brand new self contained Vortec 5.7 with a factory warranty and have time and money left over for :beer:
Granted, I'll have to fix it more often than a 2UZ or a 1FZE, but...
And expensive, And limited aftermarket, and expensive to repair and not as much torque as other engine options.
But it would be Toyota and that would be cool. I'd like to see a 1FZE in one. although it would have all the same problems.