617 80 300SD and 300TD 617 head Interchangaeable?

[Assault]

As the title ask, are 617 heads from a 300TD and 300SD (from 1980) interchangeable?

The 300SD head says 617 016 03 01 with a few characters below that that are undecipherable.

From the sound of wikipedia it seems the om617.951 and om617.952 would indeed be interchangeable.

Thank you!