hi all ,, im looking to stick a new column in my truck 1957 ( x Oregon truck ) ?? most likely one from summit raceing and im going to put in an automatic one thus doing away with floor shifter .. the problem is that I don't know how the inner steering shaft connects to the steering box ,, this causes the problem of not knowing which column to buy and what length .. has anyone done this conversion ?? if so please tell all ha ha I need shaft size and is it splined and hows it connected to column shaft ?? cheers from new Zealand