JoeIsuzu beat me to it, but do contact St Charles Isuzu. They are great to deal with, usually don't charge shipping, and there is a guy named Merlin in the parts deparment that really knows what he is doing.
Another good source for diesel info is the Isuzu section of forums over at
http://www.4x4wire.com. They have a diesel specific forum over there, and one member in particular who has a wealth of knowledge on all things Isuzu. Look for JLEMOND, Jerry Lemond, he is also a good source of parts.
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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
