Take a look at the mounting of these bullets.
http://www.classictruckshop.com/clubs/earlyburbs/members/gallery2/222/display.htm They appear to be mounted higher up?? I guess they could be hack mounted just about anywhere!
Tim - your template looks to be like the canapy express' lite mounting, which I'm sure was painstakingly restored to original. I'd go with the template.
Jim