Kickdown band lever ratios

Well I have a manual VB with a 5.0 and I do have overlap. I put in the 5.0 with a stock VB and had overlap. I swapped to the manual VB that recommended a 5.0 and still have overlap. I can't seem to shake it. I should have swapped to a 3.8 when I last had the engine out, but I didn't think about it.