Like the title says, I am looking at a set (I use that term loosely) heads and 1 is a 781 and 1 is a 049 head. Both have had a valve job with 2.19/ 1.88 valves which are stainless, etc.

Would this be a problem? Are these heads close enough to work together like this? They seller says both were worked on together so.......what are your thoughts