57 driveshaft swap help

[Martinautobody]

Hello, I put a 390/c6 from a 1974 f100 in a 57 2door wagon and the stock wagon driveshaft is the perfect length, but the c6 Yoke from the truck has large bearing caps and no one makes a conversion joint for it. I'm sort of stuck in Limbo and was wondering what other people have done? Should I get a c6 yoke with smaller bearing caps or try a different driveshaft? Years ago I would go to the junkyard and measure driveshafts until I found one! Of coarse these cars are all ancient now!

Answer:
I found out that my bearing diameter on my 6c yoke was too big. I had to buy a new yoke, (N2-3-15631X) and used combination u joint: (5-2140X) Both from Denny's driveshaft.

More details:
1957 driveshaft end:2.344 insidelock 1"
C6 yoke end needed 1310 style end:
3.219 1.062 cap

[abe_lugo]

I know when I was looking for some conversion it lead me to these guys. maybe reach out.
https://driveshaftspecialist.com/

[gasman826]

Some pickups offered a fixed yoke and others had slip yokes.  If it's a slip yoke, any C6 slip yoke with several u-joint sizes.  I'm surprised you couldn't find a conversion joint!


 https://www.strangeengineering.net/product/conversion-u-joint-1310-to-1350.html/#:~:text=The%201310%20to%201350%20U-Joint%20Conversion%20is%20a,presence%20of%20a%20grease%20fitting%2C%20cap%20size%2C%20etc.

[rmk57]

  My original 57 driveshaft had a conversion u-joint. Went from a 1350 on the Daytona pinion yoke to the oem 1330 on the driveshaft. Pretty common I think.

[Martinautobody]

I found out that my bearing diameter on my 6c yoke was too big. I had to buy a new yoke, (N2-3-15631X) and used combination u joint: (5-2140X) Both from Denny's driveshaft.

More details:
1957 driveshaft end:2.344 insidelock 1"
C6 yoke end needed 1310 style end:
3.219 1.062 cap

[RICH MUISE]

I'm with Gasman on what he said about not being able to find a conversion yoke. I found what I needed at the time at an Auto Zone. The way it was explained to me was that there are a relatively small number of main bodies needed/available. The main differences come in cap designs/sizes/etc. There is a number assigned to EACH leg of the yoke depending on needed cap styles and sizes, then there is a chart which shows those TWO numbers combined for the combination.
Off-road parts houses I'm told deal with this often.

[Ford Blue blood]

My NAPA store has an "old book" that gives all the numbers you could ever possibly need to match any yoke to any other yoke.  Just need measurements of both fittings, shaft and yoke.  The book will give an off the shelf joint to make the match.

[RICH MUISE]

That's what I was trying to say, only better worded, lol. Thanks Bill.