I have FAST XFI with my holley stealth ram and procharger.

I want to say they are interchangeable and are a viable option. The 01-02 operating systems have a few extras that I like to have.

The 97-98 PCM's are the ones to keep away from if you can. They work great for stock engines with normal bolt-ons, but more aggressive cams and forced induction can be a pain.

Mike Norris

Thanks for the reply.

MOTEC or Haltech are two of the brands I recommend, Hands down there great system's and in this field you get what you pay for.

The GM computers Like the E38 ECMs are really good ECM's. There fail safe, and plentiful.

I'm running an Accel gen 7 and for quite awhile it was running me instead of me running it. Almost smashed it with a hammer and was going to post it on youtube so others could see someone taking their frustrations out on one for a laugh.
Then I called and talked to Eli and he said he would make it right for me. After It got checked out and a new up to date board installed I now have a unit that works. They actually are trying to change the image they have gotten and the tech help is getting better when you call. Dave got right back to me when I called the other day and had the right answers and gave me further protocols if needed.

I am a lot happier camper and as long as the wideband helps me tune a lot easier and had better control of the A/F ratios I do believe I will have something I was promised to begin with, even though there is a lot easier stuff to work with out there now it is still a good unit to control what I am doing I am told.

There is going to be even bigger changes in the next 6 months to come out than what is available now from what I have heard thru the grapevine, but what it will be is going to be a surprise.