Lost Kickdown

I'm using the bouchillon cable with my 727. Are you using the transmission kickdown lever that came with the kit? Try disconnecting your transmission cable and see if you can then get full throttle. If you can then the transmission cable is not adjusted properly and hanging up the throttle. You should get full throttle and the kickdown lever full rearward at the same time if adjusted correctly. That's all I got.

Here are the instructions for a refresher. Resources: Kickdown Cable Installation Instructions - Bouchillon Performance Engineering