Low oil pressure?

nm9stheham said
You may be right... all depends on the how well the restriction made by the cam's 'oil flow interruptor' manages flow.

I just looked at a stamped rocker shaft from a '68 273 and the hole on top and bottom are the same size. Same on the adjustable rocker shaft I have here. So that restriction would not change. (Somehow I had the idea that the top hole was smaller.....??? Gettin' old....)

That wouldn't even matter because the rocker shaft only gets a squirt if oil when the cam lines up and that isn't very long even at a idle. I did have a BB that had Mancini rocker shaft shims in them and they don't fit and basically the oil shot out under the shaft and that made the oil pressure gauge bounce bad at a idle but it still had pressure