Finally started...transmission slipping?

[1966stangkid]

Thanks, ill try that and post back with what happens. one other thing i thats a little weird about this mustang is that there are alot of wires hanging from under the dash. most of them are conected to themselves with wire caps and all sorts of relays. i was wondering if this is what normal wiring looks like when its falling out of the dash or if the last owner thought he was some sort of electrision and in the end just made things very complicated?