Mancini/HS 1.6 rocker not giving me the lift expected

Rocket said
Looks like they may have labeled a 1.5 ratio rocker as a 1.6 ratio rocker.
Either way, quality control from their rocker supplier or parts marking team if marked by Hughes themselves.

This is from the Harlan Sharp site that makes distinguishing their ratio a bit easier. These of course are their roller rockers.