I have been putting off this same thing. I don't want to mount/locate until I have the sub-frame back on and the transmission in place to be sure it's in the right location. That being said the Fastenal link shows 1/4 x 20 riv-nuts - is this the size? Mine were in the old floor and I had sheet metal screws in them from a former owner. I didn't pay extra for this feature...
I have seen templates for the console shifter hole, but I don't know if I trust them? What is out there if you don't have the frame/engine in the car?
I used the old pan as a template. I picked up the rev-nut from Edmonton. I brought the bolt with me to have the guy match it. I will let you know the size a little later.