Valve lash compensation

Running a 318 with a 528 solid cam ( iron heads) . I ran 273 rocker arms last season with great results.
I went to Crane gold 1:6 rockers this year. Both 273 and Crane’s were set to .026”& .028” cold.
Valve noise is now noticeable much more than the “273’s”.
Is there a compensation in lash going from cast arms to aluminum?
Thanks
John