I have high flow fuel rails and 8an feed line. I need to plumb in a fitting for a wet kit. I noticed that earl's makes a fitting that is 3/8" male x 8an and has an 1/8" hole for a fuel pressure gauge. Could I put a 1/8x3an fitting in there and use it for a supply to my wet system?

 

Yes I dont see why not. I would suggest a fuel pressure safety switch tho.