What do these do?
Can I just block them in an aftermarket fitment?

 

The ports closest to the secondary injector bungs and oil injector plugs are from air bleeds on the throttle body. It just injects air around the injectors to help atomize fuel.

The port that comes off the primary runners at an angle is the nipple for the FPR.

 

If I'm using a sard aftermarket regulator do I still use the angled port?

Also, how do I setup the air bleeds? where do they get air from?

 

All of the air bleeds are on the upper intake manifold, right behind the throttle body facing the firewall. Depending on what upper intake manifold you have you will have either 1 or 2 small ports and a slightly larger port that connects to the oil injectors, for those that still have them.

As far as the FPR, you can take the source from the stock location.

 

I'll get a photo of the upper as well because theres a few unknowns there.

Not using oil injectors.