[LS short box]

Just a note on the Holley ECM. I had my 80 Camaro LS3/4L60E tuned recently. He has tuned a few of my LS swaps and they have run great. I'm using GM ECM/TCM.
I asked him about the Holley stuff. He said he didn't tune the Holley stuff but other tuners that he knows said make sure you if you have to do some welding on the car/truck remove the ECM from the car. Not just unbolt the ground to the battery.