Originally Posted by rover67
I think I used 3/8" and I don't remember if I drilled it or not. I seem to remember the holes being pretty decent sized... Drill bit for a 3/8" NPT tap is 9/16"
Thanks for the info - I'll give it a shot, maybe with practice on the stock fittings first. Nice looking setup btw. Great that you were able to find a stainless compressor! I'm going to try and get it hooked up to a tank sooner than later, hopefully that will reduce the load on the York. I do have a tube bumper...