We'll start with the upper to lower gasket first... This gasket will be install dry, use no adhesive at all.. You may consider using Medium grade threadlocker( Blue ) to help keep the bolts from backing out.. When you go to tighten the upper intake I believe it should be 7 Ft lbs, what ever you do try not to exceed 10 ft lbs.. Good and tight with a 1/4 " Ratchet will do the trick..
Onto the lower intake gaskets..
Some will look worse than these, some will look better..
What you will notice is a crack in the gasket as it has degraded to the point of a coolant leak.. Some of the leak made it to the outside of the motor, the other part of the leak was wicking over to cylinder # 5 port front bank.. Look at the pic and you'll see the nasty looking port of the intake gasket..
The gasket on the rear side doesn't look bad, but it was seeping coolant to the outside..
No matter what, being that the engine is a 94 I would replace those gaskets.. The front gasket off the motor I was working on crumbled when I took it off... I had a good idea that that would happen so i had the lifter valley covered with towels to catch anything that might fall in..
For the lower gaskets, if they didn't come with a tube of Silicone black( sensor safe ) then I would use Permatex Ultra Black ( High Temp sensor safe )... Once everything is clean and ready for the gasket install, add a good dab of the Ultra Black at each corner of the block and head and set the end seals in place, then add those same dabs on top of the seals, set the gaskets in place( they have set pins ) and add those small dabs again... From there you will be able to install the intake..
Some of the cross brackets for the alternator and power steering pump will have to go.. Under the alternator will be the bypass hose / heater tube.. The metal tube is held in place with a 15mm nut, its location is under the power steering pump( wish I had a pic for you ).. The tube is in the intake with a 10 mm bolt... You may have to fight that one out of the intake, but be careful as you don't want to break it... Your intake kit may include the O ring for the tube...
If I could be there to help you, you'd see how easy it really is compared to other cars/ vans...lol... I'd rather do gaskets on an old 3800 Dustbuster anyday over a 3400 U body van( I still have scars from the 3400's )
If you have any other questions just ask..