what size drill and tap?

davis3 said:

i going to sell one of my explorer intakes.
i cleaned and painted the intake,shortened the vacuum hardlines and caped them.now i want to drill and tap the #5 intake runner for the ACT sensor for use on a fox-body mustang.

just want to make sure my info is correct.

i need to use a 9/16 drill bit and a 3/8 NPT tap,correct?

Click to expand...

That is correct. Here's the link to the chart.

iCrank NPT Thread Tap Drill Size Chart (Inch)

Click to expand...