If you don't mind, I can add my experiences here, I just did this yesterday.
I got the shifter from a person on here who's had a lot of experience with them, the pioneer ca1145 cable mentioned elswhere, and the 3 brackets from gbodyparts. We did the initial cutting of the console and plate outside of the car - pretty easy to get them on with the shifter on your lap and freedom of motion to move the console around whichever way you want - totally a different story when trying to do this in the car.
The biggest problem was that pioneer ca1145 cable - didn't work! It fit fine, but you could slip it from detent to detent under the car and not see one bit of movement up at the shifter! Most noticeable on the N-4 shift. We did something wrong you're going to say. Well, incredibly, my wrench buddy has a 74 corvette that he swapped the th400 out for a manual, and guess what the ca1145 cable is a replacement for?! So we took the *factory GM shifter cable* from the removed vette shifter, installed it, and voila - solid shifting, no slop at all! Now some people obviously have had success with the ca1145, and it will physically fit, but no way would it adequately shift in this case.
Plate issues are the hooks in the front and the ashtray door mechanism in the rear make it very hard to go over the console, so a bit more cutting than what is obvious is required.
With the console, other than the obvious cuts, its the plastic below that you can't see up top that will cause grief. There is a bit of plastic on the passenger side that needs to be cut, or the shifter will want to push it away from the driver's side. The most insidious part allowed me to shift from Park all the way down to 1st, but would lock the shifter hard going from 1st to 2nd. We scratched our heads over that for a bit, turns out another bit of the blue-gray plastic was interfering with the shifter on the *driver side* that locked it up. There was evidence of scuffing where the interference was and should have picked up on that immediately, but thought it was due to all the contortions it went through to get into place.
We did the console with the seats in the car as far back as they would go and fully reclined, but if we knew how many times we'd have to install and remove that fooking console, we would have taken at least one of them out.
The front hold down bracket didn't come tapped - no big deal, but the ears were way too far forward to the console to line up on. We had to bend and unbend the ears to get them to come back far enough.
Its the blue-grey plastic beneath that you can't see from this angle that requires a bit of trial and error to get right. Unfortunately I did not get pics of the underside, there is no way I'm pulling this thing out again!
God, if it were only this easy. Getting the hinge assembly in the rear over the console was a pain - those hooks in the front don't help matters either. A bit more cutting was required.
Needed to trim the carpet and insulation some. And those ears on the front black bracket? Not even close. That is the CA1145 cable in place which we would be chucking in the trash eventually.
Gratuitous photo of the cable donor
Hard to see in this photo, but there is a vertical plate to the right of the 1-2 rod. This interefered with the console and pushed it to the passenger side - take some plastic off from the underside of the console. The console interfered with the arm of the shifter on the left, but only going from first to second - going down from Park to 1st was fine.