Liquid ,sorry to hear about your trouble, it sounds like you had your lifter pumped up.Did you notice the knock right after a hard run? I suggest to you to run to your speedshop and get a set of Rhoads antipumpup lifters.These lifters require zero lash adjustment[no preload a 3/4 turn like regular lifters].The pushrods are different length for intake and for exhaust on chevy's.Fords have equal length for both.You can have different sizes with an adjustable valvetrain for Fords when changing deckheigths.
[This message has been edited by spectras only (edited April 28, 2001).]