turbo oil drain

ok...went out to the shed earlier and had a think about the holley jets as a restrictor and this is what I came up with.
found that the adjuster end of a holley needle valve is same thread as the jets.
I drilled the AN -4 fitting I had with 8.5mm drill bit about 8mm deep and tapped it with 1/8" NPT tap. this with a bit of locktite will secure the cut down valve very well. now I have a huge range of choice for oil restriction.