Pinion yoke fit

the pinion yoke is usually a light press fit but have seen plenty that just slip on -- there is no taper to the yoke splines --- a light application of some silicone to the splines .
will prevent any seepage of gear lube.
as far as hardware such as carrier cap bolts any Grade 8 1/2 inch X 13 thread bolt the length of the originals will work --- best place to buy your bearing kit along with any shims , ring gear bolts etc, is from Ratech Manufacturing -- you can probably order direct from them or Summit Racing carries all their kits and parts.