This is the brake switch I installed for my 4L60E. It was easy to install. Remove the old one, hook up your wires as per the diagram and install. Tight quarters to work in. I had to remove the bolt for brake pedal to get my fingers in there.
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Sold the 63 and have a 68 now.
63

SWB C10
LT1/4L60E, PS, PB, Disk Brakes, CPP 4" drop coil rear, 2.5" drop spindle w/ 1" drop coil. slotted rotors, front and rear sway bars. 18"x8" Cragar SS w/ 245/45R18
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