I think I've developed an obsession with these push-to-connect fittings. I created a decent amount of trouble for myself to run them on both the ends of my vacuum lines.
The vacuum block doesn't really need any further explanation, but I'll elaborate on the vacuum fittings. Sourcing push-to-connect style fittings for the five 1/8" NPT ports and 1/4" NPT ports was the easy part. Conjuring up matching fittings for the areas that have no threads was a bit trickier. I was already confronted with this situation when adapting to my vacuum source off of the intake manifold. My solution was a sort of adapter using push-to-connect fitting with a tube stem, instead of threads, in the correct diameter to fit in an old PCV elbow. After a lot of brainstorming I settled on a similar approach for the nipples on the stock FPR and HKS BOV. However, since the stems were designed to work with their outside diameter and I needed the inside diameter, these two areas required a bit more imagination.
