1. mopar72

    mopar72 New Member

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    how much power can the 8.75 small flang u-joint take with auto trans for bracket racing have 72 duster 340 4500 tci convertor motor 12.5to1 big solid cam 9.5 slicks last time i ran car was 19 years ago back then ran the factory 4speed with a little less motor and ran 12.40 all day long and never had any trouble with driveshaft at the time i did have the best u-joints installed that i could buy i think where spicer but just a little worried about braking something with this new motor thanks phil
     
  2. Supershafts

    Supershafts Well-Known Member

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    The spicer spl series in 7260 is much stronger
     
  3. 70aarcuda

    70aarcuda Master Hoader of SBM FABO Gold Member

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    been using a small u joint since 1993 with transbrake in a 69 barracuda that has run 10.70....

    8 3/4 ...gears have been 5.13 or 4.88....14x32 slicks..
     
  4. BrianT

    BrianT Let's go!

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    70aarcuda trumps my story. I was gonna say I ran a small u-joint in a 340 4 speed Duster when I was a teenager and it survived fine. Use good quality parts like the spicer mentioned above and you'll be fine.
     
  5. 67valiant 100

    67valiant 100 go fast or go home

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    :hello2:welcome:hello2:
     
  6. mopar72

    mopar72 New Member

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    thanks for all the replies, i feel much better now with the small u-joints thanks all
     
  7. Supershafts

    Supershafts Well-Known Member

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    Just don't use some china junk....
     
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