I just found this info on a google search: There were just a few 383 RB engines made with a 4.031 in (102 mm) bore, so they are often confused with the 383 B engine. This engine was only produced from 1958 to 1960 and used a RB(raised block). This engine was also used in Plymouth Fargo military trucks in Canada until 1961. That's actually a smaller bore than the 361's 4.125" Dan george smith wrote: > > I thought the RB 383's were available only 2 or so > yrs. in the late 50's. Scarce block to come by. > --- Ron Crossley <rcrossley@xxxxxxxxx> wrote: ---- 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. This email was sent to: arc.6265@xxxxxxxxxxxxxx http:///u/?.. Or send an email to: 1962to1965mopars-unsubscribe@ http:///?p=