Cylinder head decision for 318

I understand the “buying bigger heads for use down the road” argument.
The problem is, it often ends up just not working out very well on the “temporary” motor.
It can easily be a step backwards, or if you’re lucky, it’s only an expensive lateral move.
So, as the “first step”....... it ends up as a lousy bang for the buck move.

If the stock heads/cam for stock heads is properly executed, then it takes away some of the urgency to get the next motor finished up....... which might allow you to make a few “upgrades” in the process.