Why not go on to 440 parts are cheaper and available In a message dated 2/1/2009 10:13:18 P.M. Central Standard Time, micher@xxxxxxxxxxxxxxx writes: My 413 engine doesn't appear to have any ring groove- I had considered boring to 426, but would rather not at this time. Problem is finding 413 pistons -so far the choice is having custom made forged pistons, or Sealed Power still offers a cast piston, pin, ring kit. ( much less expensive) I am planning about 9 1/2 :1 compression with 5500-6000 RPM. Tops. Might do some occasional drag strip racing, but you know how it is when you get the pedal to the metal urge . :) I would welcome anyones opinion......................................MO.............. SW IOWA ---- 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. **************Great Deals on Dell Laptops. Starting at $499. (http://pr.atwola.com/promoclk/100000075x1217883258x1201191827/aol?redir=http://www.dell.com/co ntent/products/features.aspx/laptops_great_deals?c=us%26cs=19%26l=en%26s=d hs%26~ck=anavml) [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.