Need steering column help!

I have a few questions maybe you guys can help me with
1st. I have a 70 dart, manual steering box that I'm converting to power steering.
My question is will I need to shorten my steering column? And if so can this be done safely.

2nd. I bought the car with a disc brake conversion in the trunk. With it were a set of billet aluminum hubs. Are these hubs safe for daily driving, or are they a race only item? Many thanks in advance.