I am going to use the truck megashifter for the new engine and I am going to reuse the t case shifter (np231). I am thinking about taking up the old black metal cover and cutting diamond plate to fit the hole. What can I do about covering up the hole where the cable and the t case shifter comes through? Do I need to make some kind of rubber boot for it? Won't I need to notch the floor pan to fit my shifter. I heard that it will be a little more left witht the AA 700r4 adapter.