i believe you want to replace the valve cover gaskets, not head gaskets (unless something else is wrong). st charles isuzu (800 727 8066)will send you the tube seals and valve cover gaskets if you call them. the seals get hard and don't keep the oil under the cover. it took me about 4 hours per side because of all the little stuff you have to move to get the valve covers off. the worst things to remove are the brackets for pulling the motor out.

97Rodeo Rancho9ks/Aisins/3.2L SOHC/M1 only
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Proper Prior Planning Prevents P*ss-Poor Performance--Maj. R.T.Spooner USMC(Ret.)