This probably isn't very helpful but I installed my DSE quadralink in my car with original floors and used their stencil to cut out the holes according to the seat belt mount hole. Bolted the DSE quadralink pockets parallel with the factory groove/line on the floor pan next to the wheel tub, welded it up, and everything came out perfect. I bought the DSE 9" housing with the quadralink brackets already welded on and everything lined up perfect. Let me know if there is anything specific that you want me to measure and I can take a look for you.
|