Anybody know what size tap and drill bit to use to tap a manifold for a diprocal pyrometer??

I am pretty sure it is 1/8 tap. Drill bit I am not sure. It should tell you on the tap what size bit to use.

I use the same as any of the other pyro installs post here IIRC 5/16 bit and NPT tap.

where is the best place to tap? thanks ryan