Hi Jeff,
The parts are a direct install, using stock spindles and brake drums. Very easy to install, lube 'em up, slap 'em in. A local brake guy told me to tighten the bearings fairly snug, then back off about 1/4 turn. Seemed to work good, they spin easily and there is no wobble when I try to make it do so.
I bought them from a vendor online thru ebay. I originally had purchased another set thru Bowtie Bits, but they were cheap Chinese bearings with no identification numbers stamped on them. I returned them, I wanted USA, Japanese, or German bearings. The Timken's are USA, the MBS are made in Japan. Much better quality than those ones Bowtie wanted to sell me.
Have a nice day,
Possum