I don't see why it wouldn't hold up to the weight of a 40. The original wishbone mount is only stamped steel with a steel cover. I think you are going to make a new mount for your wishbone, so you can make it as strong as you need to support the cast Model A clamp. This will give you the ball...
You need one of these http://www.ebay.com/itm/1928-29-30-31-Ford-Model-A-AA-NORS-Radius-Rod-Ball-Cap-Kit-w-New-Rubber-Ball-/371174857429?pt=Vintage_Car_Truck_Parts_Accessories&hash=item566bbedad5&vxp=mtr#ht_1314wt_1100
You can buy them reproduction as well.
Miller High Speed Company adapter...
Great information ! I guess I will have to compare this fender I am looking at with my original one on my 1939 Standard sedan to see if it is the same.
Thanks for all the replies !
Does anyone know if 1939 Ford rear fenders for a tudor sedan interchange with any others ? Perhaps 1938 ? And are the rear fenders the same on a coupe ? I am looking at buying a left rear fender but it is listed as a 1938 ?
Thanks