Need direction new to this.

[Dawson67]

I finally got my hands on a 67 GMC SWB I'm New to this I am not afraid to to work myself just need some advice from you experts on here the truck has power steering/brakes. 6 lug drums all around and is stock height I'm wanting to do disc up front and switch to 5 lug for wheel options also do a 2.5, 3in drop there are so many options out there just would like some insight on what products or company's to go with. It has leaf springs in the rear. [ATTACH][/ATTACH]