I've been a huge proponent of fitech, but it took me two weeks of emailing them every 48hrs in order to get any response from customer service.
If I did it again, I would go holley in a heartbeat. That said, not sure the tbi systems are any better than a carb for a mild motor.
I do like having my timing control with the efi, because I can make adjustments rapidly and do things not possible with a distributor. I just wish I could get more than 45 degrees worth for cruise timing.
