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rearend question
https://slantsix.org/forum/viewtopic.php?t=24901
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Author:  floyd4587 [ Thu Sep 13, 2007 8:24 pm ]
Post subject:  rearend question

I'm soon planning to rebuild my '71 225 with performance in mind: bored over .100, offenhauser four barrel, performance cam...I am wondering whether the stock 7 1/4 rear will be up to snuff, or should I go for the 8 3/4. My goal for this car is to be a cruiser with some pep. Thanks.

Author:  icaneat50eggs [ Thu Sep 13, 2007 9:34 pm ]
Post subject: 

There is also the 8 1/4 mopar rear and the ford 8.8 rear to consider.

Author:  Davids63Dart [ Thu Sep 13, 2007 10:11 pm ]
Post subject: 

My friend used to run a 7 1/4 rearend in his 70 Duster. He has a 318, and ran 13s with the rearend with 2.73 gears.

Now he has a 8 1/4 in it.

Author:  Charrlie_S [ Fri Sep 14, 2007 4:44 am ]
Post subject: 

Is the 7 1/4 a sure grip? A 7 1/4 is the weakest of the rears, but not as weak as some would have you believe. If it is a suregrip, it is fairly reliable. I run a 7 1/4 with a 3.91 sure grip in a 13 sec car with slicks. If the rear you have is in good condition, just leave it in. If/when it breaks, then change it.

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