i'm not trying to promote another site but if you really interested in it and thinkin you might go with the 4bt route you could try
www.4btswaps.com there is loads of people on there that have 4bt (3.9L 4cyl cummins) and 6bt (5.9L 6 cyl cummins) into 1/2 ton trucks jeep wranglers FJ40s soap box broncos and all sorts of other things they even have a part on there for an Isuzu 4BD1T/2T on there also or you could try this other site
www.thedieselpage.com they are mainly oriented with the 6.2, 6.5 gm, and 6.6 duramx engines people in there have them in late 70s full size buicks and what not
Nate
