Welcome. And I agree-
But on a serious note, you don't want to make a convertible out of a hardtop. The 'verts had a lot of extra bracing, and doing the job right would take a serious amount of time and money. Doing it wrong means sacrificing the structural integrity of the car. Rolling the windows down is definitely not the same, but if you want a convertible, get a convertible. Even if you did it right (and believe me, spent a fortune doing it), the car would be worth less than it is now.