Originally Posted By: CNC-Dude #5585
What valves were installed in the head, where they SBC or application specific 6 cylinder?


The engine builder said the springs were new and the shims were added to make sure there was proper spring height and tension. He said something about grinding the valve seat and that affects things and so the shim was added to give the correct spring height and tension. (If I say anything that sounds like I don't know what I'm talking about, please give me a little grace because I have ZERO background when it comes to engine rebuilding). So if he measured spring tension and height, then I have to believe these are 6 cylinder valves and not SBC valves. The engine was not built for high performance but it might have an RV cam. Does that sound correct?

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