Raised Port Head Question

Red_Duster said

Well, rockers showed up today, so I was hoping to measure for pushrod length but it looks like I have another problem… rockers are contacting the retainers pretty significantly on the intake valves, and looks like they are actually taller (pretty new to valve trains but I assumed they would all be the same.) so do I want to go with different springs or should I be shimming the rocker shafts?

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The valves are the same or very close in OAL. The exhaust valve has a thicker margin at the face making the effective installed height different, which is retarded becaise it is going the wrong way with respect to spring pressure. There are a few ways to work around that issue.

This is the reason Indy -1s uses a 5.344" intake and a 5.369" OAL exhaust valve.

Edelbrock might have corrected the valve lengths at some point. My victors were from late 2013 or early 14.