Well, Norman has emailed me and informed me that the supplier I used cannot get C223 engines any longer, which is too bad. When I ordered my 4JB1-T, he said he had immediate access to 15 more of them, so perhaps that's a better bet. I suppose it has been 20 years since Isuzu sold these 2.2 engines...

1988 Isuzu Trooper LS
2.8l Isuzu 4JB1-TC intercooled turbo diesel
www.dieseltrooper.blogspot.com