408 swinger FABO Gold Member FABO Gold Member Joined Nov 12, 2010 Messages 4,321 Reaction score 5,130 Location Iowa May 29, 2023 #26 You'll need to use a 1.65 ratio rocker to compensate for the loss of lift when using the Chevy rockers. The PRW rockers that Hughes sells for the Magnum engines are the 1.65.
You'll need to use a 1.65 ratio rocker to compensate for the loss of lift when using the Chevy rockers. The PRW rockers that Hughes sells for the Magnum engines are the 1.65.