Correcting Mopar Valvetrain Geometry

RustyRatRod said

I could certainly see power gains if the valve train is not opening and closing the valves optimally, due to incorrect geometry. Enough to feel in the butt dyno? That's anyone's guess, but I'll say this. It's attention to details like that, that make the difference in some wins and some losses. All the little "gettin it right" things add up. There's no question about it.

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I put a set of the B3 rocker shaft spacers on the built slant in my 68 Barracuda. The motor has valve stems .090 longer than stock and roller rockers. I did a before spacers and after spacers comparison of the roller travel across the valve stem tip and the reduction in travel was remarkable.
Having the load that is moving the valve centered on the valve stem tip will reduce side loading of the valve stem against the valve guide and that will reduce wear and that will keep valve seat sealing optimized. Having the roller at the rocker tip moving less also reduces wear.
It’s all incremental. But it also all adds up.
Moving the rocker shaft up over .200 induced interference with the valve cover. I was able to modify the existing VC to add clearance. But if you go the B3 route be ready for that.