Bout how much would it cost to turn my hardtop mustang into a convertable mustang?

 

I don't know, but it sounds expensive, due to the fact that it is going to need added support once the top is cut off and the roof supports removed.

 

Why would you want to do that?

 

go to Lowe's get you a jigsaw then go buy you some outdoor carpet. Cut that sumbitch off put in your new carpet, oh and get you some waterproof seatcovers and there you go hardtop to convertible for about 250. It's that easy