I may be wrong, but I was under the impression that they were dished pistons from motorhome, is why he wanted to replace them,,,,,,,,,,Mo chime in here if I am wrong In a message dated 2/3/2009 5:07:33 P.M. Central Standard Time, hemirr@xxxxxxxxxxx writes: Be that as it may, with a stock 413 with little ridge, if there isn't something wrong with the pistons **************Great Deals on Dell Laptops. Starting at $499. (http://pr.atwola.com/promoclk/100000075x1217883258x1201191827/aol?redir=http://ad.doubleclick. net/clk;211531132;33070124;e) [Non-text portions of this message have been removed] ---- 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.