Hello my name is Dwight I am currently a ground service tech ( work on all types of ground service equipment for aircraft) I put an ly5 engine,trans and ac unit out of a 07 silverado in a 72 chevy shortbed. I built the harness for the truck but sent the ecm and tcm to a program pro. The truck didn't perform correctly and they tried to fix the program but it didn't get better also they quit doing programming so I decided to give it a try. I purchased the HP pro and was able to correct some of the problems and hopefully with a little more time and knowlege this truck will as good as it looks.I am currently working on making the trans. shift firmer and at the correct time engine is running very good now. Thanks in advance for any help you all provide.