David Vizard, Uncle Tony's garage, Unity motorsport. Mission impossible Dodge 302 Head porting

Mattax said

You guys are talking past each other.
"Thinking is the same" - that is the concepts apply regardless.
"over time they figure out how to get more flow for less work out of the same casting" - How to get it done varies and takes learning.

Is there really an arguement here?
Both are true.

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If you need to make out they spent a ridiculous amount of time grinding on a set of heads then it suits your narrative to ignore the fact familiarity with a casting makes a big difference in how long it takes to get flow out of them.

pittsburghracer said

Let’s just say you can grind like crazy in areas that you think a head needs grinding and never pick up 5 cfm.

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Wonder how much Charles has spent doing that............Because he isn't familiar with where the easy gains are to be had. Its funny how GTX John can get OVER 200 cfm with just a valve job.