We are doing a 9" rear end swap from a 1977 Lincoln Versailles and it has the flat flange yoke. I've noticed there are a couple of different types of 9" yokes and I need to find out which one we should use. Short & narrow? Long & wide? I am assuming that we can't use the one from my 8" rear end?
Which one you should use is up to you. If you're using the 8" driveshaft, the short 1310(or is it 1330?) style is probably the right one. The yokes come in three U joint sizes and two lengths. The U joint size can be adapted with a combination joint, so the size isn't as critical as the length, but if you want the ultimate in strength, then a 1350 yoke is what you'd want. I changed my driveshaft when I did mine as the stock shaft had one end welded a tad off center. A shaft for a 79-2004 Mustang is the right length with a C-4 combined with a 9" and a long yoke.(If memory serves me, it's been a few years since I went thru all this)
That actually was my plan to use the 8" driveshaft and change the yoke. Should I use the 9" driveshaft from the Versailles and just have it shortened instead? Is the 9" driveshaft stronger & better?
That would be the route I would go. No telling what might not fit trying to mix and match parts. As far as I can tell Ford made only one 8" pinion yoke...and it didn't fit the 9". Don't know about the flange style yoke. You will need some serious HP to hurt a driveshaft
The Mustang shaft is quite a bit beefier than the two 8" shafts I had. You can buy a new Fox body Mustang shaft cheaper than you can have the Versailles shaft shortened in some shops.
Are you saying that you would use the Maverick driveshaft and change to the 9" yoke? I don't know what my hp is, but I am hoping to be close to 350 and would like to get another 100 horses out of it eventually.
I talked to a local shop the other day and the guy said it would be approximately $75 to shorten it. Is that a fair price?
Would you use the Versailles driveshaft and shorten it or would you use the Maverick driveshaft and get a new yoke?
Use the Versailles shaft with the flange and have it shortened to fit the Maverick. I have no idea what the Mustang driveshaft looks like that Baddad is talking about…I don’t work on cars that have computers if I can help it. If the Mustang DS has a flange then go his route.
So, as of now it sounds like the thing to do is use the Versailles driveshaft and have it shortened. I have it so I might as well use it. I would guess that it's probably a little stronger anyway.
The driveshafts are the same as far as using the yoke or flange. That's his choice there. You can use it or not use it. The U joints are no different for either, ecepting the size they use. The Fox Stang shafts are about 45-46" ctr to ctr of the U joints.
I would use the driveshaft from the lincoln and take the drive shaft and the car to the driveline shop and have them fix it up for you. just take it to them and say here this is what I want in the car make it happen. they dont have to install and all that but if you take them a driveline and some measurements it may not be exactly right. get the rear end installed then take them together its the best way in my opinion. lmk where you go and how it turns out. Im not too far from going through the same thing.
. The flange would my opinion as it eliminates the U bolt retention of the cups. But I've used both. Only thing about the Versailles flange is it's not compatible with the newer flanges used on the 7.5 and 8.8 rears, it was used in conjunction with a constant velocity joint (tandem U joints)
