Use a Fel Pro 1215 intake gasket , this will block the heat crossover
I would use Firecore wires
Dist you can get through Roseville or Mancini , no way I would pay $200 for a basically stock dist , you should be able to get the one with adjustable mech advance which you will need .
Oil you really want SL rated oil ,nothing off the shelf is right any more but you can use a good oil such as Castrol with the additive otherwise the cam will fail .
Diff is 2 qts & you need friction modifier id you have sure grip
oil pump you want Melling Only but get the M63HP not the HV if you are using a stock oil pan
Any Parts store will have a 60 amp alt or any rebuilder probably for 1/2 the price unless you have to have chrome