The outside of the ROCKER where the adjuster goes through to the valve tip.
Let me tell you what I found. I got a set of Buick 263 straight eight rockers. They have a total length from valve tip to the outside of the rocker at the adjuster of 3.604. You got 3.474 measuring from the outside of the adjuster, not the outside of the rocker. It looks like there's "around" 1/4" from the outside of the adjuster to the outside of the rocker, which would put the measurements of the two rockers REAL close that way. I have made the other measurements you did, but we are going to have to find some way to get common ground on the measurements, because the Buick rockers ride on a 13/16 shaft and the slant rockers on a 7/8 shaft, so that's throwing the measurements off. I think I might be on to something. If so, Rocker Arm Specialties can work with these, because they are ductile iron and not some bullcrappery folded up sheet metal rockers. My plan is, if they are close, I will send Gary at RAS ONE rocker and see if he can modify it like I want. That would be honing it to 7/8, possibly bushing them if there's enough material and changing the ratio to 1.6. Wouldn't that be neato? I'm no mathematician, but if one of you numbers guys can come up with a way we can find common ground on these measurements with the two different shaft diameters, I would be grateful. Here is the Buick rocker.
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