choice between stock 3.23 or upgrading to 3.55 or 3.91

[Runner]

brian,  you would probably enjoy a good conversation on the phone with this guy http://members.aol.com/doctordiff/   his name is cass and you will  look long and hard to find a more knowledgeable  guy. his prices are acually as cheep as the big mail order places and he sells several different brands. he will give you hjonest answers to your questions. 

    for instance when i ordered my axles from him he told me i should get dutchmans for a street/strip car and strange for a full drag car. he then ordered them a little longer than stock and advised me to remove my ceter button for better spline engagment.

   he also will sell you bearing kits, the spacer ( his is a really nice billet piece) for about the same price mabe cheaper.    imho Cass is the man when it comes to rearends!

[firefighter3931]

brian,  you would probably enjoy a good conversation on the phone with this guy http://members.aol.com/doctordiff/   his name is cass and you will  look long and hard to find a more knowledgeable  guy. his prices are acually as cheep as the big mail order places and he sells several different brands. he will give you hjonest answers to your questions. 

imho Cass is the man when it comes to rearends!

The Dana 60 under my 68 was built by Cass.  Had it shipped all the way from Montana to Vermont 




Ron

[resq302]

Ron,

Thanks for the tip again.  I just removed my driveshaft to get to the pinion yoke nut.  Great news!  It is a 1 1/4" nut.  After talking to Cass (DoctorDiff), he said the 29 spline is stronger than the 10 spline, although the 10 spline was stock in 1969 and 1970.  Later years went to the 29 spline for some reason.  Cass is a really down to earth guy and certainly helped me out a ton.  If it wasn't for the fact it would cost over $50 to ship my third member each way, he would be doing my set up.  And his prices are just as good too.  Definitely a good guy alert for him!

[firefighter3931]

You're welcome Brian. A little detective work saves a bunch of headaches...trust me, i know !  The pinion nut trick is something i learned about...after makeing the assumption that the centersection i was working on was a 29 spline when in fact i had a 10 spline. I am now the proud owner of an MP 29 spline yoke that i can't use  ....oh well on the shelf it sits 


The good news for you is that most of the vendors carry the more popular 29 spline ring and pinion gearsets. I believe Richmond is the only manufacturer of the 10 spline gearsets. Should make it easier for you to get a descent product at a good price. 


Cass is indeed a great guy to deal with. He has a lot of satisfied customers on many of the boards. 



Ron



Ps. Thanks to Runner (Mike) for posting the contact info 

[resq302]

Yes, Mike (Runner) a  on me.  Definitely worth the phone call.  Actually, Cass might be getting my rear to rebuild as the one local trans shop wants $87.25/hr to set up the diff.  They figure it will take about 2 1/2 to 3 hrs to do.  I have to wait and call the other trans shop on Monday as the owner was gone for the day and they couldn't give out their hourly rate.  Even with about $50 shipping each way, Cass might be the one getting my diff.

[Runner]

brian,  if the price ends up with in a few bucks id go with cass. unless you feel really good about the shop doing the work. i know of 2 "rearend shops" here locally that ive seen some down right terrible work come out of. one was a 9 inch center going behind a mid 9 second 500+ cubic inch bb ford. my friend noticed that there wasnt much thread engagement on the yoke nut so he took it to my/our friend that does all of our machine work and he redid everything for him. but im sure if the shop has a good reputation they can do it right. good luck in whatever you decide!


    im a cheap basturd and hate to pay people to do this kind of work so i do it myself ( i also tend to be a glutten for punishment.

[resq302]

My only question and concern is how I will be able to ship it and the chances of it getting damaged in transit.  I'd hate like hell to send it to Cass and have a stellar job done on it only to have the damaged or something broken in shipping.