I hate working on cars that have been worked on by shade tree idiots. I feel for you.
We just ran complete fuel and vapor lines on a 1980 Trans Am. Why? Because some rubberhead had removed them all, and ran a rubber hose fuel line from the gas tank to the carburetor. YIKES!!! They had also 'rebuilt' the 400, and forgot to install the internal little journal mounted dip stick tube that steers the dipstick away from the crank shaft.
I knew a convertible top guy that warned me in no uncertain terms to NEVER take the convertible frame apart. He said it was assembled at the factory on a jig. You will never get it back to where it belongs if you take it apart. All I did to mine was to clean and oil the hinges and pivots. My buddy took his all apart. I can't wait for the hi-jinks to start.