I have done 4 head gasket jobs on 3.0 monteros. I reused the bolts on 3 of 4 jobs. The only one I bought new bolts was the 93 where the previous mechanic did not put the thick washers back under the bolts.

Also don't worry much about setting the timing in the correct spot on disassembly. The cams will spin under spring pressure at some point. Just watch your fingers when do.

An impact is good for taking the cam bolts out. You should do the front end seals while you are in there. Also check the size of the seals before you take out the old ones. Some aftermarket ones do not fit.

I just want to tell you both good luck, and we're all counting on you.