Some pictures of an original top storage, which folds flat, will follow the following measurements.
1. Bottom or base when open is a U shape “pipe” with 4 caster type wheels attached. 34 inched accross and 19 inched deep. Stops ( to hold back/ rear window end of top) are approx. 1 to 1.5 inches high above top of the pipe frame.
2. When rack is open, the upward support ( holds the front / wIndshield end) provides a straight 24 inch pipe bar with rubber cushions on each end to rest the front of the top’s edge.
3.This vertical support is 18 inches tall from top of base pipe U shaped bar AND is “tilted” about 4 inches toward the front of the U pipe frame. I believe this will keep the top’s weight forward and against the Stops, as not to have the whole rack flip backwards with the
hardtop on it.