Hmm i bet those has a 2.3 intake valve. That is crazy they had radial intake clearance issues.

Here is a pic

I just measured mine, I checked between 10 before tdc and 10 after with dial indicator and never found anything less than 225ths. My cam is 621 lift intake 241 at 50. Afr 315 2.25 intake. I checked and most of those Brody heads have 2.3 intake. Maybe valve float at some point. Thanks for this because it made me double check