Lemmee ask this:
Was the rearmost exh manifold stud
broke off on either of these two
cases? Mine was, not sure if it was
a contributing factor, or a symptom.

I replaced the studs, I think I used
Dorman product, but don't remember the
size. The nuts I used were from VW ...
I think they're the ones they used on
the 4cyl 2Gen VW. They were much easier
to get than the Isuzu ones! I think
they are some copper alloy...

Good Luck!

C/YA!
Jeff
'88 Trooper
2DR LWB 4ZE1 5SP
bone stock DD