EngineTech are the brand I use all the time, have had good luck with them. Check the sellers on ebay, search:
1976 Dodge 360 Valves
'76 era or whatever year your heads are, then you don't get into the magnum engine applications.
View attachment 1715550543
View attachment 1715550544This photo happens to be 318 head, but yes EngineTech valves.
