I replaced my intake rubber boots today. Along the way, I bothered to do some discovery on best method, at least on my '97 Sport-i. The winner is Lucky Phil- taking the intake manifolds off is enormously easier than working the boots otherwise. I'm not even certain I could have installed the new boots at all without removing the manifolds; the bar that ties my TBs together is very close to the frame bracket for the transmission brace and wouldn't move back much at all. As it was, I removed the clamps, pushed the rubbers away from the manifolds, removed the 3 mani bolts, slid the rubber back onto the manifold and off of the TB. The mani and rubber pop right out with only a little fiddling and no force. Reverse the process to install. It's easier to install the mani bolts in their holes and place the rubber before working the whole thing into place; take care with the threads as you have to keep the rubber from pushing them around. Installing the screws last is difficult because you can't slide the rubbers back away very far. A ball allen is nearly demanded.
I had different gaskets on L & R sides. No info. Both sides stuck to the manifold and came off the heads clean. I cleaned the surfaces and put a very light coat of Permatex #2 to be sure they seal.
Reinstalled my throttle rod, synched the TBs, set the TPS and tomorrow a test ride. Idles dead steady at 1100 now. Again.
Those throttle rod knobs are still in the works, but they are a secondary priority behind real work.