We finally finished the install on my Accel 4 bbl. tbi. The mechanical was easy, but the software was tough. I got the unit off ebay a few months ago, turned out the guy had it on a 5.0 Mustang. Fortunately the ECU had been changed to use an after market ignition(I got an MSD 6T) so I can fire it with the stock distributor out of my '89 Jimmy(may she rust in peace) The difficult part was the files loaded in the ecm would not even let the truck start. I downloaded a file off the net for a Buick Grand National and used that to start it. (Yeah, it ran pretty rich) We got it running and have stroked the fuel maps so it pulls pretty good, but there is a lot of tuning to do yet. If any one else is using the system let me know how it's working you. I'd like to talk timing maps also. Thanks John So MUCH to do, So LITTLE cash.