8.75 u-joints

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mopar72

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