thanks for the number, although i looked on the OEM isuzu website and it doesnt come up as anything. how much was the gakset from a marine dealer? there is a bobcat service place here i could probably order one from. as for the glow plug, i think ill try to cap it off for now and see if the compression will blow it out over time. at least that is what has been suggested so far and it seems like a better way to go that to remove the head entirely...

86 Turbo Diesel 4dr Trooper 4JB1TC
89 turbo diesel Trooper-RED