Many years ago,i bought a Ron Cash resin 50 Chevy COE. Not totally accurate,but close enough.
I was going to make a car transporter with a trailer,but never finished it. I scratch built a frame using plastruct,mainly a straight frame from front to back. Cabovers have a hump in the floor almost like vans do to make room for the engine. The aircleaner ahs a mounting tube with 2 bends in it to move it forward to get it out of the way. Does this help?
I'll see if I can get some pics.