You can use your TH350 pedal set-up, just remove the TH350 downshift cable tab. As for the TH400 brkt, visit www.mrbuick.com He makes excellent repros
I NOW HAVE BOTH PARTS THAT YOU ABOVE WERE TALKING ABOUT AND IT SEEMS THAT THE PEDAL ITSELF MUST BE DIFFERENT. Any thoughts?
Local yard has a 71 Chevelle. I will compare the pedal to the one I have from a 70 GS455. If it is the same, I will get it. EMail me direct at GStage1@buickperformance.com