The "Throw Away 318"

You are essentially using just the block and using 340 360 everything else which has been my point all along. 318 guys will say "318is just as good as a 340..." which is misleading. They never finish the sentence which would go something like "...with ,mods, and a wise choice of parts from a 340-360..."
Considering you’ll have to get the parts it was never born with, according to your route, this just puts the engines on a equal ground parts wise. Not cost. Re purposing the OE heads into ported heads is an expense you could avoid if you knew how to port. If you don’t, then you pay.

This also applies to the 340. I can not even remember the last time I seen here a hot 340 build that used stock iron heads or ported iron heads.

It’s not exactly misleading. Everyone knows more cubes is better on power production. The point you say you have been making has been the known issue. Your beating a dead horse by talking and going that route.

The point of the thread is clearly stated.