A loaded question without a clear answer to be given what ever paremeter your thinking of. The spread of 270 cfm to 340 cfm is extremely wide (70 cfm!) making it a super general blanket statement.
Personally, for a motor home, I would not stroke the 440. But, this is an interesting topic and thoughts.
The mention of stock heads is up there. I'm not sure if he was meaning Max Wedge heads.
