440 source

I forgot to mention that I had to do alot of clearancing for the pushrods, especially the intake side. I'm using Crane Gold race rockers. I ended up using offset rockers for the intakes. I used COMP pushrod length checkers to determine how long the rods needed to be. The length checkers are 5/16th dia. I then bought 3/8th dia. rods from Smith bros and the clearance was gone so more work was needed. I had the heads milled after all the pushrod clearancing was done and discovered that it helped gain more clearance. What that told me was keeping the rods on the longer side is helpful to gain clearance. It keeps the adjustment screw in the rockers further up in the rocker which moves the rod away from the head where the issue was. Also worth noting is that the problem is worst when the valve is in the closed position ( lifter on the base of the lobe). What this means is the problem is not related to valve lift, I.E. it does not matter how much valve lift you go with. I have no idea if the Eddy's or INDY's have issues with this.