A 741 is a correct stock item in 1962. Replace? Maybe not. Below is another perspective, from Don D., former member here. Gary H. > -------Original Message------- The 741 gets a lower rating because it has a 1.375 rear pinon bearing (742 = 1 3/4 , 489 = 1 7/8) however maybe before we finalize that we should measure the bearings on a Ford nine inch and a Dana. It night surpise yu to find they are similar. Since all Mopar 8 3/4 use the same diameter pinion U joint flange hole (either coarse or fine spline.) The weakest link if there is one is the same spot for all three. Failure is pretty rare. I ran a 741 case in my MAX WEDGE 426 car with 3.91s for almost ten years and I abuse that car . 3800 stall Lupo converter and 30.5 inch tall rear tires with a 9 1/2 inch tread. I replaced it about a year or so ago with a 3.55 gearset for cruisin which just happened to have a 489 case and i took the 741 with its 3.91s and put it in my rail. They are a real good diff and while a 489 or742 would be desireable unless you have a firebreathing monster under the hood any of the three will stand anything you can give it. - Don. D. > > >> Just pulled the Rear End from my 62 Sport Fury > >> The part number on the housing is 2070741 > >> Is this the correct 8 3/4 set up for a big block? > >> If not what should I be looking for, I plan to put in a 413 > >> Mark -- -- -- 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/d/optout.