Thats why i ask. Now the question is what would be close enough in six cylinder engines to duplicate the integral head which had exhaust and intake on same side same as the standard six. What made them different was the intake was cast into the head with only the exhuast removable. Also had a different valve cover design as well.
I guess the question here very well could be: Was the Chevy engine you have in mind an all new from the oil pan up engine, or was it just a newly engineered cylinder head with the integral intake manifold?
If the latter (and while not knowledgeable on that engine) is the case, then modifying the engine from the '63 Nova might be a good answer. Again, I don't know the answer, never had the urge to go study that vintage of Chevy 6 to find out.