My local engine builder has a small block build going on with pro max heads on a 4 inch 360, it should be on the dyno early next year. The pro max heads are on the shelf at the shop waiting so I’m going to ask them to put them on the flow bench to see how they do. I believe they claim to flow around 285...
The price for the pro max heads is also tempting as I can get a set in the low $2000 price range Canadian.... I would guess that the trick flows with be closer to $3000.
