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if you remove the original sprag you want to use a bolt in as nothing fits as good as the first time it was installed at the factory . get the A+A ultimate sprag , anything else is wasting your money .

But if the race is tight inthe case and not all galled up I would just replace the rollers and springs .

is this a street car , race car , autio VB or manual ?

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It's a Race Car 9.80's Hemi Coronet. We really don't want to get into drilling the case for the bolt in. The guy doing our Transmission said the Sprag looked good, I just felt that while we have it apart we might as well put a new one in. If changing the Springs and Rollers will help than thats is an idea.

Thanks

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the regular bolt in doesnt require any drilling at all the ultimate needs 2 holes drilled. if you dont have any kinda bolt in sprag at all you are racing a time bomb! sprag failure is the reason 727 grenade