Searching for 12v switched power after ditching ballast and installing aftermarket electronic ignition

mshred said
The fuse block is currently going to run the Mallory CD ignition, an Autometer tachometer, and a basic CD deck....at some point later down the road, it may get an electric fuel pump, which is something that may be added to this fuse block, so setting up the wiring now for future growth makes the most sense for me.

Probably a silly question, but I am very green in the wiring department- Does the fact that J2 and J3 are going to a relay, before powering my auxiliary fuse block, make the scenario any better? Again, I am probably going to go overkill on the relay purposely for future growth.

Thanks for all the back and forth and assistance, it truly is appreciated!

I don't really understand what you mean with J2 and J3 going to a relay. Draw a diagram.

Not sure why you need a fuse block for the ignition on wire, or a tach. CD deck I would power from the auxilery buss if there is room in the OEM fusebox. Alternately have it trigger a better connection using a relay and fuse. It doesn't need to be on during start and the battery is already under lots of load.
With an electric fuel pump, yes it will be best to be on during run and start. How much current it draws at 12 and 14.5 V will determine if the wiring is sufficient. There's really no reason to use one with a carb. EFI is another story.