I have these 3 sets of heads ....have a friend that wants to buy them but not sure what they would be worth any help is appreciated thanks

Casting numbers are
2206324
Works for 61-62
361-383-413

2406516
Works for 64-67
361-383-413-426

3769902
Works for 1974
400-440

Miss ya Dad 3-31-55 9-21-10 70 Coronet R/T Convertible