Thinking of changing direction with my engine. Opinions needed

If this is not a resto, I would put the Eddys on it. If you plan on more mods in the future, you will be dollars ahead compared to fixing 50 year old technology. As far as the 6 pack, if you have a 4 barrel setup that you can swap on to get everything sorted, then go back to the 6 pack. If you don't want the hassle, sell it and put on the 4 barrel setup.