High CFM heads - What would you chose?

Rob, I think this is one of those situations where you’re “racing flow benches”.

I find it hard to imagine if I flowed that Brett Miller ported W5 on my bench it wouldn’t break 300cfm.

I have a customer down in your area that had some Indy 440-1 heads he had ported himself flowed by a shop down there somewhere.

They were like 312cfm.
I told him that it was pretty unlikely they flowed that little.
I mean, a 5 min blend and a valve job and they’re in the 325-330+ range.

Some benches are just low...... and some are just high.

I think the numbers you have there are just low.

As it is with the dyno, the best use is to do before and after testing....... and not get caught up in comparing results from other dynos/benches.