what solid cam is equivalent to a hyd 268 ?

66fs said
You never get it. 273’s were never smog motors they are not 8 to 1 like late 360’s and 318’s.

You are right; they were nominally 9.0,with a steel .020gasket.What were they really and how much does an.028 gasket change that?
What did yours measure at when you took it apart?