Made a little more progress on Saturday.  I got the 4-speed hump portion of the patch mocked-up in place.  Things are temporarily riveted until I used the 3M metal bonding along with the rivets to fasten in place.

Determined I was fairly happy with the measurements using a spare console as a reference:

For the measurements, there are several areas in the rear seat one might use.  The middle one holds the tape measure the best, but it is actually the closest ripple to the front that needs to be used.

Marking where to drill the holes (on this side, they are in-between the patch panel rivets since there is a little overlap:

Holes drilled:

I used some slightly longer rivets since there were some spots where I was going through 3 layers of sheet metal:

A couple of rivets in place and I realized I needed to do some hammer\dolly work.

Riveted in place.

Next steps are to review the measurements one more time.  Rivets can be drilled out and holes welded closed if need be.  Then cut out the inside hole where the shifter goes through.  I won’t be using the 3M metal bonding until the weather is warmer and my heater wont ignite the fumes.