It seems the parts indicate that the 4.03125 bore / 3.75 stroke configuration RB 383 in 1959 and 1960 are different | casting number is 2120329 those 2 years. If you order new bearings, 1959 and 1960 are called out as those years only. http://chucker54.stores.yahoo.net/mainbearings1.html Thanks, Gary H. > -------Original Message------- > Whatever, I give up.I just know it won't fit in any B or RB motor I have. > > Jimmy > > On 7/27/13, Spiketon Ridgerunner > > > > > > > > > . Nothing oddball at all about the RB 383 > > is the same as all pre 62 B & RB engines, the cranks are all the same, its > > in the bore & stroke. It was a two year only engine (59, 60) in Chryslers > > to help off set the demand for 413s. -- -- -- Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html. -- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. http://groups.google.com/group/1962to1965mopars?hl=en. --- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. To unsubscribe from this group and stop receiving emails from it, send an email to 1962to1965mopars+unsubscribe@xxxxxxxxxxxxxxxxx For more options, visit https://groups.google.com/groups/opt_out.