I run the Jesel 1.7's on my -1 heads, I dont remember the pushrod being that close to the rocker, I also run standard ball on ball pushrods (Non Tapered 3/8) from Manton. Andy, Do you think this would help clearance problem? Im running bout .790 gross lift before lash. The way the cup style adjuster srews set in the recess, it might give added pushrod clearance over the ball cup style pushrods.