Driveshaft question

[JimK]

I recently picked up a Duster that has a 318/904/7 1/4 in it. I'm thinking I might put a 440/727/8 3/4 in it. If I did, what driveshaft would I need? Would a driveshaft from a 340/727/8 3/4 work?

 

[70aarcuda]

yes

 

[pishta]

short shaft 727 is the same length as a 904.

 

[70aarcuda]

Short shaft 727 are usually found in pickup trucks...

 

[roccodart440]

Honestly, unless you have a driveshaft in hand already you should measure after install and have one made to the correct length and strength you require.

 

[TrailBeast]

Honestly, unless you have a driveshaft in hand already you should measure after install and have one made to the correct length and strength you require.

Agreed.
You could figure it out by getting the 7.25 to 8.75 difference and then also subtract the 727 from the 904 length, but as much of a PIA it is to measure and wait for one to be made it's the best way.

 

[70aarcuda]

I did that went we switched from a 8 3/4 to a Dana on 71 Dart.....had the shaft shorten 1.12 inches..

had a new shaft made for the Demon...i subtracted 1.12 from measured length of 48.75