do you have a 4 point harness ?
are your removing the back seats or using a cage ?
since i have the back seats i am mounting my 4 point 2 on the side of the seats where the old belt holes are or i might mount them to the seat rail on the sides so when you adjust it the belt doesnt choke you but i think i will use the car body holes then the top 2 go through the seat and anchore to the beam under the front of the back seats
If you dont have back seats you can use a cage or they have a brace that titan or supra store mvp one of them sells a brace that bolts in behind the front seats.