23 to 18 spline what it takes and how good i'll be!

demon1515 said
yeap, first how much it take to convert from 23 to 18 spline and how good this will be?

and also how strong is the 23 spline unit?
would it be enough for a really hot street 440 that will be seen track with slicks once in a while?

it is a 72 swiger minitubed dana60 and guestimate 550 hp.

the 23 from what ive heard will not hold a stock 440 or street hemi with old bias tires! the 18 is the only way to go.

as for how to do it i think all the internals are different but im probably wrong, somebody else will know. hope this helps