Differences in big blocks - pre and post 1962

jboymechanic Posted 2019-12-31 12:52 AM (#592275) Subject: Differences in big blocks - pre and post 1962 Expert Posts: 2196 Location: Muskego, WI I know that the 318 poly v8 changed crank flanges and bell housing dowl pin locations after 1962, is the same true for big blocks (RB)? 1960fury Posted 2019-12-31 8:04 AM (#592294 - in reply to #592275) Subject: Re: Differences in big blocks - pre and post 1962 Expert 5K+ Posts: 7395 Location: northern germany After 1961, not 62. Yes, big blocks too. jboymechanic Posted 2019-12-31 8:46 AM (#592296 - in reply to #592275) Subject: Re: Differences in big blocks - pre and post 1962 Expert Posts: 2196 Location: Muskego, WI Thanks Sid! To be clear, was it just the crank flange that changed for the big blocks, or did the dowel pin locations change as well? 58coupe Posted 2019-12-31 11:43 AM (#592303 - in reply to #592275) Subject: Re: Differences in big blocks - pre and post 1962 Expert Posts: 1740 Location: Alaska The crank flange is the only change on the 62 and newer big blocks. The later bells will bolt to the early blocks.