Sorry Dennis, I forgot there was a separate file with the dimensional information in it:
From the seam at the front of the tunnel to the front edge of the shifter hole, it's 6 1/2 inches. On the side-side measurement, here is what I did: from the seam inside the rocker jamb, where the rocker is spot welded to the floor pan there is a hard edge there. From the left (driver) side seam to the top edge of the shift hole opening is 28 1/8 inches. On the right (pass) side, the measurement is 29 inches even. This makes the distance from the center line of the car to the edges of the shifter opening 7/16"