Joe,
I hate to admit it but I have seriously thought about using some of those jap trucks. A close examination reveals the narrow boxed frames makes them a very good candidate for an early model chevy truck swap. The 4WD also proves to be an excellent donor as well, if your into that type of swap. Glad you mentioned it because some folks think Chevy with a Chevy is the only way to go and it is a major "sin" to use foreign parts. I'm with you on these as a great frame swap...nice daring post...lol.
Dave