Not really impressed by the hack job in that FB pic. Shift rods on the inside of the car and tweaked and bent to accommodate not putting the tunnel in right, seems like an issue waiting to happen to me.
I don't have non carpeted pics of my original floor speed hump from the top, but the Brewers parts help you get close without having to try to re-engineer te hurst shifter rods.
Every where the tunnel hits the floor is cut and welded, to give room for proper installation of the shifter and.rods. Only the top of the shifter is inside the car.