Re: how to do the turbo oil system?
I ran 5/8 th line for oil drain, and yes it must go straight down, with no kinks or flat runs in the hose. It will smoke like crazy if you dont (I know!). oil drain must be at bottom of turbo, supply can be wherever.
I ran 5/16 oil cooler hose for supply, with a #64 holleyt jet for a restrictor. Came off an oil gallery outlet on the block, but you can come off the oil pressure sender if you need to.
My pan was off to do the oil drain, I welded a 3/4 " BSP socket to the pan, then drilled through. Not sure if you could do this on car, i guess it depends on room. I have heard of people punching the pan, rolling the metal and tapping, but not sure how well it works. The socket looks good and is real sturdy.