If you want to build a really cheap open element system then I have the instructions for you.
This is what I used on my 89.
First you need the air intake tube from a Z28 Camaro. I used one from a 93 but I think anything from 93-96 will work. Might be able to use one from some *-Series Blazers but not sure.
Now you need an air filter from a V6 ford explorer I used a 1995 model one. The Penzoil part number is PZA-188 I think.
You will need two sections of wire to extend the wires going to the IAT (Intake Ambient temp) sensor that screws into the bottom of the stock air box. I used two one foot section and four wire nuts to connect the wires.
You will also use a tube of RTV sealent I used the clear kind but any color is fine.
Remove all of the various intake crap on the drivers side of the motor and cut the wires going to the IAT sensor. Go a head and splice your wires in now if you want but it does not really matter when you do it.
On one side of the camaro air tube there will be a smaller tube sticking out. This tube is just the right size for screwing in the IAT sensor. You will need to cut the smaller tube flush with the body of the larger tube for hood clearence issues first though. After that is done just thread the IAT into the hole using the right size wrench. The sensor will self tap its way into the plastic just make sure you don't thread it in too far. I think mine is about 1/2 to 2/3'* of the way in.
The larger end of the tube with the hose clamp on it will fit over the throtle body just barely. You will probably have to push it a little. The tapered end of the tube will just barely fit inside the air filter if you prep bot the tube and the filter right.
You will want to leave the air filter out in the sun or somewhere so that it can warm up and exspand. Coat the tapered part of the tube with a little bit of spray on grease or pentrating oil.
Lightly pull on the gasket portion of the filter to stretch it some. You do'nt want to pull it to hard or the gasket will rip. You just need to pull it enough to slip it over the tapered end. If you have a bench vice you might want to put the tube in it so you can use both hands to slip the filter over the tube. If not you can probalby hold it between your knees and do just fine it will just take longer.
You want to pull the filter up on to the tube the minimum amount in order for it to seal. Too much and you will lose filter surface area and/or tear the gasket.
Alright now you are almost done. Use the RTV sealent to glue, yes thats right I said glue, the filter to the plastic tube. Before you put the filter on you may want to lightly sand the area where you are going to glue so that the sealent has a better surface to grip onto.
Put down one bead of sealent then spread it out with your finger to make sure it covers both sides. Let the sealent dry, should take a few hours, and then put down two more beads on either side of the original bead to completely seal the filter. Smooth these beads out and let the filter cure over night. Again if you have a bench vice it will help out a lot because you can clamp the tube down and not have to worry about the filter getting hit sometime during the night and moving.
In the morning just slip the tube over the throtle body and then plug the newly extended wire back into the IAT sensor and you should be ready to go. Start up the car and feel around your RTV beads to make sure no air is leaking through. You should be able to feel any air leaks with your fingers by holding them close to the bead.
1989 LE Bonne 122,000 miles
Custom Open Element filter system, Strut Tower Brace from 2nd gen bonne
Light Up Pontiac symbol in grill, 16 wheels from newer Bonne/G, performance tires, performance ignition system, Upgraded brakes.