Thanks Ron.
I've decided to make provisions for half doors. I've started the mock up for that. I'll make shape the final part, than make molds, then final parts. It will be one piece that mounts and conforms to the frame then bonds to the inside of the body skin. This provides for more shoulder and arm room. If the half door is wanted the outer skin can be cut, reinforced and used for the door. With the door the step over height is 20 inches.