I am building a 440 with a sumit cam and lifters. The pushrod length is stock 9.31 inch and the rockers are summit aftermarket. I am concerned that there is a great difference in off lobe lifter lash(colapse). This off-lobe commpression of the lifter varies from .045 to .120. What would be considered the max lifter compression off-lob? I'm use to chevys where we would expect .030 but I have been told that some older mopars used much more. Does it matter that I have this varience? please help Mike