Setting up 977 springs....
Phillip
To setup 977's for large XER cams you need the following....
Option 1)
.070 longer valves
Option 2)
Patriot Performance custom retainers
and hardened shim(.010 - .040)
Option 3)
Manley 5/16" beadlock keepers
and hardened shim(.010 - .040)
So far these are the only setups that will yeild the right install height(1.850).
Phillip

