Schuyler, Go to the link below and read Part 2 Section 1 "Thrust Block Varriations" and it'll give you the info you need. http://www.autohobbydigest.com/8_75.html Dan sky62 wrote: > > Gary, I've heard that the axle shaft thrust block/spacer or button > (cylindrical type piece), > in the middle of the center chunk. comes in a couple of different sizes. > It may be that it's just a different size in a sure gip then a open > center chunk? > I'm not sure what center chunk had what, but you need to know so your > axles > will fit. and of course you can grind down the one that's bigger. Maybe > someone has more info on this? as, I have a 741 case (open diff. ), > with more gear in it. > I'd like to make it into a sure grip and swap it with the 741 case > (open diff.) that's in my car now. > > thanks, > Schuyler 62 Dodge Dart 440 wagon w/ Poly 318 > <http://www.1962to1965mopar.ornocar.org/ml-wrobel62.html> > FYI - I Do the Decal designs for the Poly head 318 and more! email me > with your needs - > <sky62@xxxxxxxxxxxxx> ---- 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.