A friend had bought the Holley FI system about 3 years ago and recently tried to install it on his GTO 455. After several tries to get it to work and many E-mails to Holley he finally gave up and put a carb on the motor.:surrender:
Dean did he happen to say what the problem was? over at the other site several guys are using the Holley set up with no problems. I am leaning towards FAST EFI set up myself.
Kevin, the Holley Commander 950 is an older system, one of the first MPFI systems to come out. While there should have been no reason for failure, it can be a challenge to setup and tune. The newer Holley EFI system is far superior and much easier to install and tune. From personal experience, it is much better than the competition. I am using it on my new aluminum Dart 540 build and am very pleased with all aspects including support. Support has often been the knock on FAST. If you want, I can probably get you a deal on one though my friend and owner of Competition Marine Center (CMC) up in Moscow Mills Mo. They are a Certified Dealer / Installer of Holley EFI. Let us know here on the forum of your progress which ever direction you choose.
Bullshark