Aluminum 317’s would be better for the 4" bore, plus they are like $150ish on ebay. Sodium valves are useless on this build, it will never see high enough RPM to benefit from a lightweight valvetrain.
Aluminum 317’s would be better for the 4" bore, plus they are like $150ish on ebay. Sodium valves are useless on this build, it will never see high enough RPM to benefit from a lightweight valvetrain.