Get your self a set of vortec heads, single 2bbl. holley tbi for a 87-89 chevy p/u, vortec intake manifold, mild street cam ( for torque)roller cams are good but can be alittle $$. You can get a vortec tbi intake or a vortec carb. intake (but you'll need an adapter). I don't know how much hood clearence 82s have (mines an 84), I had to use a open element air cleaner, but I had to shorten it to about 2''. I think it was orignially 14x 2.5''. I cut the filter down, layed a thick bead of rtv on the lid, set the cut side in the rtv & let it dry. You can't tell it was altered, I used a K&N filter.
Anotherthing you could do for an air filter on a single 2bbl. tbi is try a kit from Spectre, they make the hats for carbs/tbi (single or dual air filters) & the tubes, elbows, &filters.
This is the way to go if you don't want to port you manifold, some say porting has really helped, while others say don't bother. Basically what your doing in this swap is giving yourself many more intake options. You can't use a stock crossfire intake w/ vortec heads. You can use any intake/head combo if it clears the hood. The 2bbl. tbi allows this.
If you need an egr valve for emission testing, then you'll have to run an external tube to the intake (like 86 & up vettes have them). Look on the thread about crossfire mods requiring no ecm mods. You'll see what I did, I did'nt go w/ vortec heads b/c 1. emission testing here, the egr deal 2. lighter aluim. heads 3. back then they didn't many votec intakes to choose from.
Otherthings you'll have to keep in mind is fuel lines, throttle brackets (your existing cables should work, mine did) breather filter, ect. If you have done intake swaps before, then you should be alright to do this.
I think I'd spend my money on cam, kit, lifters and modified throttle body (I'm back on the original post - not your 85)...but that's just me.
