So car came with a 7 1/4 and I put in a 8 3/4 got new shock plates for a 8 3/4. The best I can tell is with a 727 trans I need a 44.99” driveshaft. 48” is to long. Am I correct? Measurements are not including yokes
7 1/4 to 8 3/4
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Kendog 170
Let the boy go !
Stretch Limo
TrailBeast
AKA Mopars4us on Youtube
HemiSSDart
Dartus Interuptus
Not rocket science, body type, trans type, rear end type, u-joints used and look at a chart that has been in use since the 70's will give you everything you need, no need to reinvent the wheel everytime...
33IMP
Well-Known Member
I think he's trying g to BUY the right shaft. You won't find one. Take your shaft to a driveshaft shop and have it made into what you can use.
(The chart says your shaft needs to be 2.25" shorter.)
As said above, look at column C. It shows axle centerline to yoke c3nterline, for both a 7 1/4, and an 8 3/4. 2.26, ten thousandths away from 2 1/4.
Plus, you may have to have the shaft modified to fit the u-joint required for the 8 3/4.
So, follow the advice others have given you, take your shaft to a driveshaft shop, and get it made right!
(The chart says your shaft needs to be 2.25" shorter.)
As said above, look at column C. It shows axle centerline to yoke c3nterline, for both a 7 1/4, and an 8 3/4. 2.26, ten thousandths away from 2 1/4.
Plus, you may have to have the shaft modified to fit the u-joint required for the 8 3/4.
So, follow the advice others have given you, take your shaft to a driveshaft shop, and get it made right!
Last edited:
junkyardhero
Well-Known Member
^^^ this. 100% this.
it seems like every shop has "their own way" and sometimes, if you're lucky, two guys at the same damn shop will each want it measured their own way.
That is for a 72 Duster/Demon with a 340 according to the chart I'm looking at...
Same in the past here, machinist said the slant 6 904 drive shaft would hold 500 hp
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