'67 Cuda 273 2bbl to 4bbl upgrade?

Almost nothing done and talked about here is necessary , why don't you just buy a Lada to get where you are going ? And my car starts in 20 below , I just chose not to drive it on our salt covered roads . This is an entusiasts site , you sure sound like you got buckets of it , 12 posts in 7 years , WOW . One thing in your post I believe 100% , when you state this " I'll be alone " yes I believe you are and will be .
I think anyone should be able to voice an opinion without being belittled. It is up to the OP to decide what to do with his time and money. The valid point is: Adding a 4 barrel carb is more complicated than one would think. However a "67" 273 is almost 9:1 compression and should have a solid cam, which lends itself to simple mods that should give more performance and mileage. It is also hard to argue with a 48 year old car that always starts and gets to point A and back without a second thought.