Need a measurement. Short Fleetside

[bigmoe]

I'm setting up my 65 short fleetside but the box is still at the body shop. I did the dual exhaust myself back to the mufflers but I think I'll get a muffler shop to do the tail pipes. I'm thinking it might be easier for them to do it while the box is still off but I'd like them to exit to the side behind the wheels. I don't know how far the fender comes down so if someone could give me a measurement that would be great. Bottom of the frame to the bottom of the fender, just behind the wheel. TIA