I am looking at adding an electrical distribution block under by dash to feed some extra components. I want something that I can feed 12v battery supply into it and then I can add circuits off of it as needed. I am not looking for a fuse block, but just an electrical distribution strip with maybe 4 connections or so that I can add inline fused circuits later as required. What are my options at the local parts stores?
Where should I wire the 12v feed in from on the car (70 Challenger)?

Thanks