71 Dart get 408/ Trick Flow Heads....
What I tell people when the question about soft springing comes up is.......
If you don’t do it, and it eats the cam....... it’s just shame on you.
The bottom line is this....... not every Hughes 6468 SB cam fails.
So, how different are the cam break in procedures for the ones that are living vs the ones that arent?
If I’m doing the motor here and it’s getting a FT cam that needs a dual spring for valvetrain control....... it gets broken in with the inners removed.