I made my own intake tube and got a PCV question
 

I tigged up an intake tube out of 3.5" aluminum last weekend. What should I do with the PCVs on the valve covers, loop them together or run them back into my intake tube? I am running a catch can just off of camera.
https://cimg5.ibsrv.net/gimg/www.per...5679f6d838.jpg

How was the catch can routed before? It'd be best to emulate the same setup.

The 2 hoses with the red arrows feed back into the stock intake. They were not associated with the catch can in anyway.

What it boils down to is I dont have 5/8 pipe to weld into my new intake tube and I am wandering if I can just loop the PCVs together and not order 5/8 pipe and weld them in

I'm not as familiar with this generation of PCV system and how it is best routed, but looping them together is not a good idea.

The function of a PCV (positive crankcase ventilation) system is to relieve the crankcase of pressure from blowby, clear the oil vapors and moisture that contaminates the oil, and recirculate that to be burned off in a cleaner fashion.

More to read here:

The "Catch Can" Explained - Gen V Small Block Engine, Drivetrain, & Exhaust - GM-Trucks.com