CB Compitition Fuel injection system was ran on Doc Nugent's 914 Lite project. Worked great for his car.914 Lite Project Page
Lifted from the siteA "big four" displacing 2.5 liters (2499cc to be exact): 103mm bore and 75mm stroke with CB Performance's Ultra Competition fuel injection (four 31 lb. injectors in a pair of Weber-like 48mm throttle bodies),"
As for meeting the sub $1K price.
Simplest is MicroSquirt, and stock EFI parts. You could change your injects to hi resistance units to save a bunch of resistors hanging out. The MicroSquirt is pretty small and water tight so mount it where ever you wish.
Might be able to do that build pretty cheap, I would get a 1.7, or 1.8L intake, they flow better than the 2.0L does. And more even fill of the runners.
OK....but...how many people have done this? Meaning MS with the stock components.
Please raise your hands for under a $1,000
I have
I installed MS2 V3.57 with a MS relay board and wiring harnesses for far less than 1k.
I got the ECU on CL for $200 and ordered everything else on DIYautotune. I actually have a spare set of all of the above with a tuning cable for sale in the classifieds.
I used all stock D-jet parts except for the TPS which I pulled from a junkyard. I had to fab up a plate with 5 holes to make it work on the stock throttle body (took less than an hour). After that it is just soldering the D-jet connectors to the wiring harness and start tuning. You tell the system what the resistance specs of your sensors and TPS are and the flow rate of the injectors.
You don't actually need any resistors in line to use the stock injectors. There is a setting in MS called PWM that accounts for the low-resistance injectors.
All in i think I had this up and running for less than $600. I already had a d-jet system on the car so I had all of those parts already.