how do you take out the front seat brackets out of a 69 bug?

Do you mean the ones mounted to the floor? Those are welded in place.

Just wait for the floor pans to rust out if you don't want to grind off the spot welds. OEM ones are welded in pretty good - cheap Brazilian aftermarket ones are poorly spot welded and much easier to remove.

IIRC a good air chisel works pretty nicely and quickly also! later, dave Reminder........ Before you criticize someone, you should walk a mile in their shoes. That way, when you criticize them, you are a mile away from them, and you have their shoes. Frieda Norris