I just did this on a 47 business coupe. A couple of tips, first test fit your doors and weld bracing inside to keep the gaps right, then before you weld anything have your running boards on hand to make sure the rocker boxes are bent at the right spot to fit the boards. The boxes I installed were from EMS and needed some work to fit properly. I ordered both the front section and the back section and had to fit them together. The last thing I can help you with is the captured nuts on the inside that were provided were the wrong thread. I had to tap these out to fine thread one size larger to make the board bolts fit correctly. Hope this helps. I think I have lots of pictures if it will help you I can maybe post them.