the teraflex does not come with the shifter extension, you will need one, otherwise you will have to permanently run with a hole in the inner shifter boot or without inner boot at all. Because it has a screw, where a clip retains it in place, if no extension is used, the boot will hit the screw on 2,4,6 gears before even engaging, simply because clearance is gone when the boot is on.
Parts that need modification:
Get a 1.25 inch thick (or whatever the height of the BL is) and 7 1/4 inch in diameter piece of cross link polyethylene foam, this will be used to fill the gap between the stock transmission-body seal and the body, so as to get the "sealing" back. No water, heat or other elements getting into the cabin or under the inner shift boot. Not to mention it helps greatly in reducing noise from the transmission and engine compared to using the inner boot itself. Otherwise, you will have a hole, literally a hole in the body for anything to come through.
Inner shifter boot, because its a rubber boot attached to a plastic ring at the bottom, the boot needs to be cut, the ring trimmed down until you can shift to 2,4,6,R without it touching the hard plastic and preventing full engagement, it will still shift on those gears, but any pot hole, it may pop out of gear. After its trimmed down, you need to reglue the boot with epoxy to the trimmed ring.
Before finally putting the inner boot, you have the option to add even more insulation between the seal and the boot. It has to be a soft material, like the rolls sold at home depot that have denim attached to foil. Just make sure its not fiberglass (health hazard) or anything hard otherwise it will hinder the boots movement.
The inner console needs to be trimmed if using the shifter extension, so the inner boot does not contact during imperfect roads.
The outer shifter boot needs to have the left clip on the front, that holds it to the outer console cover and to the inner console, cut. So you can shift in to 1st and 3rd with no problems, otherwise, it will prevent complete engagement of the shifter. It will still shift, but any pot hole, it may pop out of gear.
The inner console needs to be trimmed a bit around where the left clip was supposed to "clip on" to. So the shifter does not contact it and prevent it from having a hole made due to friction.