The 1942 Ford And Mercury inner fender aprons were made without a recess in the apron that would give the proper clearance to use tube type shocks. In the 1947-48 Ford cars, the inner apron stamping was changed by adding a bulge or recess that would allow clearance for the new type tube shocks. Most often a person wishing to replace his lever action shocks with tube shocks would get a large hammer and modify the inner apron as needed. If you want it to look stock , I would suggest you look for some 47-48 inner aprons with the recessed stamping.