Oil Pressure switch Thread size?

[fleetwood472]

Does anyone know the thread size of the oil pressure switches on these motors? I am doing a custom EFI setup and am going to be using a different oil pressure switch thats compatible with the computer and just need to know the thread size. I found a switch from a newer car that is compatible with the computer and the size of the threads say 1/4-18 Will this fit the caddy motors? Thanks - Justin

[pageboy]

IIRC, it's 1/8" NPT. If it's not that, then it's 1/4" NPT. I know it's a pipe thread; it's the size I might be remembering wrong. Either way, you'll need some sort of adapter to fit those threads.

[DOC]

Justin, are you sure that is 1/4 18? Most all oil pressure sensors we deal with NPT.

DOC