Probs w/ Fuel inj. logical to swap to carb setup? Options

[Next GenRacing]

Okay i have been working on my dads 914 for some time now, it has a freashly rebuilt motor, it ran good for about a year after the rebuild. but now it wont start, i suspected air flow meter/sensor. replaced it w/ the same symptoms. it wont start unless the flapper thing on the inside is like half way pushed in. then it will run while i hold the flapper to keep the a/f ratio's happy but when i let go it dies instantly. i have been through it many times w/ no luck. i am contemplating just swapping to a carb setup. i have seen numerous 914's w/ carbs on them, but it always seemed kinda stupid to put a carb on a car that was fuel injected.

also what kind of costs am i looking at to do a complete RELIABLE conversion?
also is there any performance gain to doing this?

just some info on pros and cons of doing the swap would be nice as well as anyhelp w/ the problem i am having cause that would definatly be the best solution

sorry if i am rambling
Danny