B&M Shifter Not Matching Up w/4L60E

[Chevelle LT1]

I would be greatly appreciative if someone could please help me out with this (fingers crossed):

As I am just now getting my Chevelle on the road, I am running into problems with the shifter. I am using a B&M Pro Stick shifter (with the 4-speed gate) and an LT1 w/4L60E. Per the instructions, I am supposed to adjust the shifter cable so that it lines up with the new selector level when the trans is in 1st gear (all good there). Next step is to confirm that everything lines up when if Park (checking both ends of the spectrum). Unfortunately, when I line things up in 1st gear, by the time I move it to Park, the selector level has traveled considerably more than the shifter cable end. Even going between Park and Drive there is a clear difference in how things line up. At this point, if I adjust Park to be OK, then I am not able to get the shifter into Drive (with the car moving forward). Can anyone shed some light on this?

I have read and re-read the instructions until my head hurts, and still don't see anything. It has the GM lever, the spacers, and everything else the instructions call for. Any advice is mucho appreciated.

~ Jason