Well unless you're very experienced with automotive computer systems, that --"for the most part"-- will cause you more heartache than you can imagine !
There are surely down sides to carburation, but then again when you look under that hood and just see a carburator and some linkage instead of 400 miles of wiring and vacume tubing it might bring a smile to your face
Question is can you toss your computer in your state on your vehicle and still pass emission rules ?
Forgive me i'm from Southern Calif and in my state if you sneeze on it, it won't pass smog !
Good luck !