nuetral safety switch

The old single wire switch is pretty hard to come by and expensive when you do find one. Like 66cuda said you can use a 3 pin switch. The middle pin is the one you hook your wire to. Get one for a 69 trans. and it'll drop right in. NAPA sells the pigtail for the 3 prong switch. If you want originality try Year One, Laysons, or any other restoration parts supplier.