Hello all, I'm sure this has been done 1,000 times but I thought I'd make a post about it since I think it'll be cool.
A week ago my junkyard got an IROC-Z in that had been wrecked, it had been in the yard all of 3 days but when I got there the entire drive train had been taken from the car, but they had left the air box, the guys at the yard gave it to me for $12 and I took it home. It looks like it'll just bolt into my car, I went back to the junk yard to find a solution to getting the air into my TBI, and I found a hat for a TBI off what I believe was an early north star and the other was a massive air cleaner box off of what I believe is a 2500. Neither have any real emissions on them but the plastic hat looks very restrictive inside.
I'll be installing it all at some point during the week but and thoughts or comments would be great. Here are two pictures for the options of routing the air into the TBI.

 

I tried that many years ago. The issue was trying to get a filter on the end of an oblong hole. I recently bought one for tbi off Amazon for like $50. Came with pipes hose couplings and all.

 

Interesting.

I'd have expected that a '91 Camaro would have a cold-air intake on it as standard equipment. Maybe have to remove and plug a vacuum hose in the summer.

Am I wrong?

I've got a '77 Nova that has cold-air equipment as original. Pull a vacuum hose and it can't draw heated air.

 

^I agree^.

Use the stock intake. Don't need to reinvent the wheel, here.

 

The plastic hat is not restrictive, I made 356 hp at the tires breathing through one on my G20. NBS truck MAF and simple cone filter as well.

 

Dual snorkel air cleaner setup is your best route.

 

I used a slightly different method on my TBI van. Back when I had a basic TBI 350 the stock 454 air cleaner and duct hose was worth ~10 hp at the tires compared to the stock small block air cleaner and intake hose. The 454s air inlet is 8" wide and 4.5" tall. With a K&N pressure drop in the air inlet is not even a thing, all restriction was the TBI unit. I bored the 3704 to 2" and put a 454 TBI on a 1" open center spacer on the near stock 350. My MAP would read almost barometric at WOT. With 1.6 full roller rockers, the 3704 manifold and thorley tri-ys the 350 made ~180 hp at the tires. With the 454 air cleaner and ducting it made 192 hp at the tires. With the 454 TBI it made 204 hp at the tires and more importantly in my big heavy van, 315 ft/lbs of torque at 2,500 rpm. I then put a 1996 production GM LT4 203/210 @ 0.050 cam and made 250 hp and 320 tq. Even in the low compression 8.75:1 1-ton 810 swirl port headed 350 (180 hp/300tq at the flywheel factory net ratings) the LT4 roller cam made better torque everywhere. It is not difficult to add a larger snorkel to a stock air cleaner either.

ThIs is a L31 with flat top pistons, some head work, mild GM 6492' roller cam, 1.6 rockers, Edelbrock ProFlow 4 EFI system and about 380 hp. The 454 air cleaner with a K&N will not be a restriction to it either.

 

Hard to beat the looks and function of this setup on a carbed/ TBI engine. Id love to put one together for mine but Im not even sure it would fit on a bird.