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The spec from Hughes for bottom protrusion underside the rockers is .450" which equals about 2-3 threads sticking out of the adjuster screw give or take a little

Yes, I am talking about the OD of the cup, that is all...at max lift the clearance spec is as I mentioned in my original post. So I am just wondering, based on the fact that im not sure what gauge my checking pushrod is (made it out of a junk one my dad found at work last year) if the 3/8" pushrod cup will hit since I only had 5/16" pushrods last year



The cup OD will be the same size so you dont have
to worry about that if you have clearance now




How do you figure that? The cups the pushrod manufacturer's use are all the same o.d. regardless of the pushrod thickness? Is it only the cup size that dictates this o.d.?



Some of the manufactures have some what different
cup OD's but not by much... the stem thats pushed
into the PR is different diameters




Ahah! good point Mike


Hopefully I will be fine then