If you’re wanting to make cheap power with a TBI truck do the air cleaner lid flip, add a TB spacer, a larger injector pod, and put a chip in the computer.
Only problem with this, is you are sucking hot air from under the hood. Not cool air from outside.
Removing the restrictor takes about 5 minutes and you are at least getting cooler air from the fender well.
Ultimately, have a cowl induction type scoop, build a air box to seal the air filter to the scoop, you will gain 40 - 50 degree cooler air from outside with minimal restriction.
I am looking at a cowl type scoop on my current project, but want something that looks different but functional.
The spacer I added between the TB and factory intake did show a difference in the butt dyno on a stock high mileage mill. This truck will be getting a newer 290 horse mill in the near future, but want to retain the TB!