If you buy the EGR manifold, you will want to plug the passage at the head so the carb runs cooler.
If you are gonna run headers, then for sure I would buy the non-EGR intake, or for sure block the passage.The headers will not work correctly at the center 4 ports,if the passage is open.Some guys have had trouble getting that port to stay blocked.
The EGR signal port can be added to the carb at any time.It's just a venturi vacuum port. It might not end up as pretty as the factory install, tho.
I say let the next guy worry about EGR.