what's my wheelbase?

Don't waste your time with bolt ins (unless you bolt them in and then get them welded). Mine are made of 2x2 tubing (from auto rust technicians) and they come through the floorpan about 1/4" and get welded to the floorpan which really stiffens the car up. After the carpet is put back down you don;t even know that they're there. If I remember they cost about $100.