push rod help!!!

I am trying to measure the pushrods to make sure they have enough load on them. I marked it with the rail torqued down, than again with the rail unbloted. This is on my 360LA . Its either .030" a little bigger, or a little less. So hard to get a mark.

they are stamped MPR-324 which are mellings. So i'm guessing the guy replaced them once before. The engine came with the Edelbrock performer RPM cam package. I have a Comp Cams Extreme 20-222-3 hyd. in their now.

Reason for me checking the pushrods is because i'm getting lifter tick . hold or cold. I have heard these series cams to develope a "sewing machine" effect and some tick is normal.

What should i do ?? Order some longer rods???