i dropped mine 4-6 no c notching, still have 3" axle to rubber bumper on frame clearence which is plenty,
early classic kit comes with front and rear shocks, drop spindles, drop springs front and rear, rear shock relocators ( simply grind off old upper shock mounts and bolt in the supplied new ones) super pan hard bar, all mounting hardware, rear axle u bolts, front 12" rotors, front calipers, master cylinder, new pre bent brake lines, proportioning valve, and ummm i think some other stuff to, and it was $1,400 for everthing. Thats really a killer deal. Your doing a proffesional drop and front brake disc conversion too. Very easy and takes about two easy days to complete. Your going to want to have it alligened with any drop you do. I would suggest since your in the area and will have it all apart, do new ball joints and tie rods too, not much more cash and your already there, these trucks have an amazingly better handling and steering when you replace them.
Also, the early classic kit keeps your trucks ride and handling feeling like it should, not sloppy and bouncy like a cheap or back yard (hack the springs) job.
you mentioned worring about a bad stance, the 4-6 drop levels the truck front to rear, any thing less like 4 or 5 drop in the rear you will still notice a rake in the truck (were the rear looks higher then the front) but no worries, the shock relocation is super simple, just bolt it in, and no c notch unless you go more then 6 to 7 inches drop in the rear, thats more for air bagging it and putting the truck on the ground.
heres a pic after i did my drop, again, no cutting, no welding, all bolt in. my rear looks a little higher because there was no floor in the bed making it lighter and sit a bit higher untill i got the wood in, then the rear sat level with the front.
hey i know, lower the horse trailer, put matching paint and wheels and.... ya right, like were all made of money haha.