I don't have a reference project as my donor was a speedster and I'm creating something that didn't exist with a WWI military Model T. Anyway, can I make a broad presumption that ANY bolt with a castle nut and cotter pin would have the bolt head coming from the inside and the castle nut and split pin accessable from the "outside"? Such as the three bolts on the front fender irons? Castle nuts outside the frame? Guel tank support to frame, three bolts with heads inside the frame and nuts on top of frame? Steering bracket to frame, lower bolts with head inside frame and castle nuts on bottom, but the long bolt in from the side would be bolt head outside of frame and castle nut by bracket?
Crank case arm to frame, same thing... bolt on top with bolt head inside of frame and castle nut on top of frame, but long side bolt, head from outside frame and castle nut between arm and CC>
So, a few exceptions on the long bolts that can't be any other way, but MOST others castle nut on outside of frame?
Thanks in advance.
Pan-to-frame bolts both fit only one way if you're using the blocks, the long one going in and the short one going out. I don't know how the question would have been answered at the factory a hundred years ago, but I suspect the rule was nuts out where possible, in any place where that was the easiest way to reach them with a wrench.
Just remember as a rule of thumb, your nuts should be showing!
a good rule of thumb in warm weather.
But, I get the just and will try to show off the split pins whenever possible.