Sorry - updated my profile - SF Bay Area
How about you get your hands on a canadian BJ60 or HJ60-even a registered frame would be good enough. then plunk in the engine of your choice, from toyota HDT to cummins 4BT. It is already registered as diesel...
Of course Zimm will chime in and state that this is technically illegal, you are a bad person because you are breaking the law, your truck will get crushed on the spot, and you go to jail forever, and he is right.