I have installed a Hughes Whiplash cam in my 440. Also had 0.50 taken off of my 402 heads and went from a .40 to .20 head gasket. Advice from the guys here on the forum was to check my pushrod length. Can anyone tell me the process for doing this? I have stock, non-adjustable stamped 1.5 rockers and hyd lifters. I also made up a homemade dummy pushrod with adjustable length to measure. I need to know how to measure and what to look for so I can either reuse my pushrods or order different. Thanks!