The simplest way to find the 2 or 3 piece wheels is to look at old GMC's and Chevs both and look for the 10 hole type. If they are on front, only 5 of the holes will be used. Once you spot a 10 hole wheel, If it is on front, look for the 1 or 2 piece lock ring. If it has no lock ring, it's one of the widow makers. If you find one mounted on the drive axle, a 2 or 3 piece rim will have a flat surface where the centers are connected to the rim. If it has what we call a semi drop center, its a widow maker. We used trucks with this type of wheel to deliver gasoline and I can still tell the difference from 50 feet. Many trucks used the wheels you are looking for and there are still some around.
