I am about to start on the steering for my '35 and have some questions. I have a GM column, Unisteer rack and soon to be ordered Sanderson block huggers.

what are the differences between splined and DD shafts, advantages/disadvantages?

at $100+ is a "vibration reducer" nessesary? is it a must have or doesn't make much differnece?

I will most likely be looking at a 3 u joint set up, correct? so I will be needing a support bearing?

any ideas on the best brands and places to buy everything? Borgeson and flaming river come to mind. if I use flaming river parts I will likely order from a cheaper retailer.

Any input? Thanks!