Heater box questions: reassembly.

[In The Ten Ring]

I am finally getting close to the point where I can reassemble my heater box. I bought a gasket set from GMC Pauls. Do those gaskets need to be glued in?

I seem to remember the parts that enclose the back of the heater box held in not only with rivets but with a type of "caulk." What should I use to replace that?

Also, I bought the round rubber gasket that attaches to the heater box around the fan and squishes up against the front of the cab. What is a good adhesive to stick that to the back of the heater box?

(You can see the round rubber gasket I am talking about here).