Exactly.... You'll need to figure out the following as well :
1. How you're going to mount your OEM seat belt end and seat belt buckle to the floor plates.
::: I'm making some 1/4" thick chromoly tabs that will bolt into the sides of the floor mounts that these will bolt to.
2. You'll need new seat belt buckles ( Female end with the red button )
::: I ordered a pair from an E30 M3 that don't have the firing pin mechanism.
3. How you're going to mount your harnesses to the car.
::: I'm building a harness bar for the shoulder belts to loop around, then I'm bolting the sub straps directly to the floor, and on my floor mounts I drilled and tapped holes for the lap belt eyelets for the lap belts to click on to, so I can take them out for street use and use my OEM seat belt.
Alot of work huh ??? hahaha Hence I haven't driven my car in 3 weeks....
Oh yeah... don't do Brides... I've heard I'm even blaspheming for using Cobra's and not Recaro's... hahahhaa