Ok I have an autometer sport comp elec oil pressure gauge with the sending unit. Where do you tap in the sending unit to the engine. If possible I'd like to use a T fitting so I get the factory hookup also for the emergency alert. Any help would be great thanks in advance.

 

I believe alot of people drill and tap the port above the oil filter. There is a little port bolted on there, that isnt used for anything so you can just take it off, drill it, tap it and bolt it back on.

 

Take your pick......



Far Left
97-2000 Corvette OFAC (still available) Part Number 12551587
Comes already drilled and with a metric thread M12 x 1.5
Drill out the metric thread using a 7/16" drill
Tap 1/4 pipe thread
Use a 1/4" male x 1/8" female reducing bush
Screw the 1/8" pipe threaded sender into that.

Center
Fbody OFAC (No Longer available from GM new**) Part Number 12551595
Comes blank (not drilled and no thread)
Drill out the boss using a 21/64" drill
Tap 1/8 pipe thread
Screw the 1/8" pipe threaded sender into that.
**Part superceded by 12577903

Right
GTO OFAC Part Number 12577903
Comes blank (not drilled and no thread)
Drill the center using a 21/64" drill
Tap 1/8 pipe thread
Screw in a 90 deg 1/8 pipe male female elbow
Screw the 1/8" pipe threaded sender into that.