Here’s a formed mount that we typically use for Model A radiator mounts, but you can use them for two other purposes. The hole is 3/8″ but if you have a drill bit and a way to spin it clockwise, that hole can be whatever size you want (>3/8″).
Available formed the other way too, so you can mirror them on either frame rail.
Click the picture to view them in our online store. Regular price $7. On sale until May 12/’11.