On my '65, the top pops up a little when I release it from the hold-downs. The top is light, I dont know if there are extra springs or not.
I have to plan to have the top down before I leave. Putting it up takes just a few seconds at a light if need be, but not nearly the convenience of having a power top. The only pro I can think of, is the car doesnt have the additional weight of the top ram's and the pump.
The car is pretty much a no-option car, except GT V8 4bbl Package & HD Suspension package w10" Drums. No PS, no PB, No Power Top