building 8 3/4 489 section

having an empty spare center section makes me think building an extra set to Change. Currently i have the same section with a 4.10 Ratio makes me run 12,7 with a 5 Speed but just using 3rd gear @ 5800 rpm in the trap. Wanne go quicker. So Ratio has to be shorter. 4.56 or even shorter? DrDiff shortest is 4.56, Mancini has a 4.86. from US gear ( who is that?) Need advise here and what brands to order to have a reliable diff for

• ring & pinion ( how many splines best ), best Ratio? best brand?
• sure grip ( i always been happy with clutch type ),
• bearings and bolt sets,
• yoke - Billet? Steel? ( 1350 / 7290 conversion? or just 7290? )
• crush sleeve eleminator kit ( containing all shims ?)
• girdles
• U Joints
• what else?

never did this before and i am in the states next month and can take all with me... :) so i Need a complete Shopping list. And a racers advise on the Ratio to use... :)