The readings should be within 10 to maybe 15psi of each other. Do a dry then a wet test. Thanks, Gary H. -----Original Message----- >From: Dave Isle >Well folk new question what should the compression be on a 361? All I can remember is that there should be no more then 10% difference between the cylinders ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.