[Terry,OH]

I would suggest you contact Jon Anderson in PA he is in the V8 Roster of members.
For Cabriolets: early 35 the windshield frame pins for the top attachment are straight and for the later cars they are angled. The chrome pockets for the pins attached into the front header are also different. I have been told the front and rear wood headers also differ early to late.

There are three rubber plugs in the large holes in the header metal pan and the rib in the pan fits into a rubber strip that is attached to the top of windshield frame recess.
The photo below shows 34 top hardware. Note the pins are straight and the appearance of the pockets, same appearance as 35. The skirtless thumb screw is correct for 35.