Yes, the head is iron.

Not much movement lately on the project -- lots to do at work, holidays, etc. Hope to get back to it in the next week or so.

I did acquire a stock 1986 diesel Trooper airbox which should work perfectly with the 4JB1-T intake tube, just needs a little trimming. I'll post photos when it's installed.

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