Heads for magnum

@DrEamer -
“Pro Magnum” rockers by Competition Cams.
These will eliminate the need to drill the head as shown above.
At $562, it’s a good price.
COMP Cams Pro Magnum Shaft Mount Roller Rocker Arms 1622-16

I also did a quick search on the Edelbrock & Trick Flow heads. With the trick flows, this is also stated for the rockers & magnum heads:

“Magnum engines must use Harland Sharp S72025K (1.5 ratio) or S72026K (1.6 ratio) shaft mount roller rocker arms for proper oiling.”

(IDK anything about that and what can actually be used or not.)

The 1.5 ratio comin in at $900, Harland Sharp Heavy-Duty Roller Rockers S72025K
And the 1.6 ratio coming in at $933
Harland Sharp Heavy-Duty Roller Rockers S72026K
Now the TF head choice is in the springs and retainers used, so the price varies from the current $1019 to $1129. Hyd. spring to solid roller spring.

The Magnum heads also have 2 flavors of springs, the Hyd. spring currently @$919 and the Hyd. roller spring @$949.
Edelbrock Performer RPM Chrysler Magnum Cylinder Heads 61775

There is also a note saying....

“.... Accepts widely available small-block Chevy adjustable rockers 1.6 ratio.....”

Once you figure out what Chevy roller rockers your going to use, break out the calculator and start in with the math calcs!