air gap install, guide pins on deck!!!
Those pin holes are not drilled for a reason. Your new intake does not have them because you need to align the ports before they are drilled.
There is a procedure for this. It makes the difference from having an intake for looks or having it for performance.
They should be used to hold your intake where it is suppose to stay to keep the ports aligned. If you notice you can move the intake front and back with the bolts in loose. \
The web on the intake runners is not that wide. It is important to keep them centered during install. Finding center is an easy task.
Every motor we build the intakes runners are matched. SB mopars are great for having the pins. Using them is a no brainer for those who are not lazy.
Little motors are the underdogs so we need to squeeze every pony and RPM out of them we can.