[Alan Roehrich]

Yes, that height is critical. By the way, take a die grinder with a cartridge roll on a mandrel and polish off the burr around the oil hole over the pushrod cups on all of your stamped steel rockers. If you do not do that, it is just a matter of time until you punch a pushrod through the cup in the rocker, because of the stress risers from that burr. I've seen a $20K Stock Eliminator engine destroyed by that exact failure.