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SignUp Now!If you use a 5/16 18 allen head set screw you wont have to predrill the hole.Just run the 5/16 18 tap in the original hole .If the plug has 4 or 6 threads give the tap 6 or 8 full turns.
Torque converter feed restriction installation instructions.
Drill the existing hole to 21/64".
Tap the drilled hole with a 1/8 npt tap.
Install a 1/8 npt allen pipe plug.
Drill an orifice hole through the pipe plug. I prefer to use 7/64".
Draw a fine mill file across the face of the pump cover to knock down any raised metal caused by the orifice installation procedure.