The windshield would be the same as any curved windshield for a convertible, 1973-79. The shape of the hardtop Super Beetle (1973-75) windshield is the same, but I have been told the glass for the convertible is thicker. I don't know of any suppliers for new curved windshields.
i am looking for a parts car to continue on with my restoration - from what year super's can i use the major parts?
will hardtop parts [windshield, windows, etc.] work?
i am located in eastern pa.
The other windows for a 1973 convertible should be interchangeable with all 1973-79 convertibles. The back windows crank up and down so they are completely different from the hardtop. The door windows may share the same glass as hardtops and/or earlier year convertibles but I do not know.
There was a suspension change mid-model year for 1973. Some were two-bolts; some were three bolts. Pre-change suspension was good for 1971-73½; post-change was good for 1973½-79. Hardtops and softtops had the same strut set-up for the corresponding years. I was not implying it was an exact half-model year when I said "1973½." I'm not sure the chassis number or month of production when the switch was made.
The steering wheel hub had a mid-1974 change, so you can swap with 1972-74½. 1971 models also had the same size but the wipers were not controlled by a stalk -- there was a switch on the dash instead -- so that steering wheel may not be an exact swap.
Bumpers for 1973 interchanged with 1968-73 Beetles and Super Beetles for convertibles and hardtops.
Rack-and-pinion steering started in 1975 for Super Beetles so that won't help you. Fuel injection started that year also.
Most other parts will swap from a 1973-79 convertible and since all convertibles were Supers for those years, they also shared parts with their hardtop cousins -- for the most part.