I'd agree with Felpro but they are #2 in my book right behind an actual Isuzu gasket. Check out
http://isuzu.stcharlesauto.com/ for about the best Isuzu parts department around. The Isuzu guys over on
http://www.4x4wire.com swear by them for parts. They used to have a guy named Merlin around there that really knows his stuff. Also used to be they would knock off some $s if you mentioned you read about them on 4x4wire.com or online and shipping is very reasonable. <edit> forgot to mention, call them for the best info. Click on the link at the top to parts department to find the number. Their web order form doesn't cover Isuzu back past about 1990 <edit>
Personally, if I had the money to do it right I'd go with the Isuzu head gasket, and get the Felpro kit to cover the rest of the gaskets (intake, exhaust, valve cover, etc). That said, last truck I put a head on I used a Felpro gasket and misc gaskets I had laying around. Several years later it is still running strong.
Have the head checked for flatness and such and look for cracks, especially around #2 and #3 exhaust valve seats. Also helps to do a quick retorque on the head bolts after about a thousand miles. The Felpro gasket says it is "permatorque" but it never hurts to be sure.
_________________
95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)
MEPR: Man, my 4x4 makes all other LUVs look good
