OK boys, here's the deal, you have a switch and you have a cylinder and you have a bracket on 47-53. I assume your trucks have foot starter. If so, the switches are just on and off. So if someone says "the 62-66 switch fits into the housing": since the switch and the housing are the same thing, I don't know what they mean. If you can use a 62-63 switch (and whatever cylinder you want) and that spring loaded type switch fits into the dash or into the bracket, then that is what I would do. It sounds like Oldblue is saying the 62-66 fits, not sure what it fits? The hole, the bracket or both or ? The spring loaded switch has an extra momentary spot to engage starter, no push button necessary. that will look the best. Supposedly all years of cylinders will fit the 62-66 switch. (47-66) That only matters if you want to use your stock key/cylinder, otherwise you would just buy a new cylinder with keys for $10 along with the new switch. $20. and bezel nut. $7. and make them fit the dash hole and forget the bracket. The new switches are "Panel" mounted, meaning they are held in place by a nut on the front, the dash is sandwiched between the switch and the nut, no bracket. They will have an anti-rotation key or slot or hole which you may have to add. When switching to a 12V V8 350 you don't want a on/off setup anymore! You want what Bill refers to as key start. 55-59 or 62-66 whichever fits. Not trying to pick words but the switch assembly you buy consists of a switch body or housing with rotating contacts built into it and blade or screw terminals out the back. The reason I keep recommending the 55-59 switch is the 62-66 looks like it would need a think spacer behind the dash whereas the 55-59 has threads all the way to the switch body.
