Magnum replacement head ?

Those are factory assembly line Chrysler heads. The quality is exactly the same. Check the valve seats and valves. If the valve seats in the head are not badly eroded or sunken, you can run them as is, even if you find signs of cracking between the valves.
If you plan to have a valve job done anyway, just have them crack checked first.

Not sure of build yet would like 375 not sure if stock heads can do it..