Wheels/Tires/Disc conv./lower kit

[AJLChase]

O.k., so I've been away from these forums for awhile and had a few questions.

I'm throwing around the idea of putting a GMCPauls kit on my 67. This is what comes with it 2 1/2'Drop spindles, 5 lug disc brake Conversion ,5" rear spring, 2" front springs, 9" booster,master cylinder,prop valve. Will this be all I need to do a complete drop as well as complete front brake swap? I've already replaced the ball joints, tie rods, control arm bushings, pitman arm and idler arm. As from what I read their kit will work just fine.

Next question. I'm wanting to put some fat white walls with some black smoothies on as well. Will this now be a 5 x 5 1/2 rotor? With a 15 x8 front wheel and 15 x 10 rear wheel, what size of tire should I be looking for?

Willing to help clarify what I'm after in case I am confusing anyone. Thanks!