on my rig i'm using an 86 C10 cab. its a factory auto truck, so there is no shifter hump, just the standard trans tunnel. i have a pair of 465 humps, one that Tim gave me, and one that came out of my 81 K30. they are both identical. i test fitted it to my floor boards, and it doesnt quite fit. the mounting flange on the sides hump is parallel to the ground, where the cab floor is about 45*. the front fits fine, but the rear has about a 1" gap. is this normal? or do i have the wrong hump for my cab?