Originally Posted by
john8662
They will interchange. The later 6.2's pretty much have later designed heads anyways (injector angle change).
The main difference is that the '93 6.5 heads will have large precups, which could hurt fuel economy slightly.
If you decided to go this route, you would need to do both heads.
Verify the cast number on your old head verses the new head, you'll likely find that they are the same, except one has the turbo precups in it.
Swap Precups? Maybe, and I do mean maybe, depending on machine work performed on any of the heads, the cups might not seat properly. I can go more into this later...
J