Thats exactly what I have come to believe. I am leaning toward stepping up to the 4L80. I was talking to Dave Jarvis who drag races a full size chevy van. The truck leaves wheel up and is close to breaking into the 9's with a small block. I asked him what box he was using. He told me it was a bone stock 4L80 with a good converter. If a clean low mile unit becomes available I think i will go that way. If I build a bullet proof 4L60 I could have over $800.00 in parts in it.
Thanks for the input.