Hi'YA Ben.. You've replied to a thread that was last active in 2014, 10th month..
But you're right of course. The frame carried the serial numbers as well as the top of the trans/bell to be seen from the top of the car.

There were 2 other "hidden" spots at the rear of the frame but they don't always appear. Usually rusted over & gone. I won't even touch the registering issue! LOL..