1970 CUDA - 6.4L GEN III Engine SWAP - WOT Issues

I just remembered I had a similar problem with mine. 1 of many. It was a ground problem. The trans ground was loose and my battery was in the trunk and I had to add a ground from the battery the chassis(bumper bracket bolts). You may need more grounds.

I checked the ground a couple of times, due to the original error, but I'll do again and I let you know if something change. Thanks!