Anyone local to me capable of correcting errors on a 904 race build

Big Dad said

Copy of bill , after it arrived I called and questioned all that about the correct imput shaft , he told me he knew what he was doing

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Looking at your bill I can see that John does indeed know what he is doing. Because I have done this conversion from a lockup to a none lockup, I know what is involved. But my conversion was done years ago based on what was available in aftermarket converters.
John appears to be very up to date in what is available and it appears that Ptc makes
a 9.5 inch converter with the lockup spline count without a clutch to convert your lockup 904 into a non lockup. The only other thing required is the billet manual shift valve body. It’s right there in the bill.
John probably did not want to share his trade secrets with you when you asked why there is a lockup input shaft in there. He simply chose to tell you that he knows what he is doing. Indeed he does. But obviously there was some kind of mistake made during
the rest of the assembly process.