81 1/2 ton- lowering front 6" too much?

[Richs'55]

Before everyone thinks I am in the wrong forum, my question is about my '81 short box 1/2 ton frame with stock (for now) suspension.

Have the 81 frame all cleaned up and painted, remounted the '55 cab and box. I know I don't have all the fenders, bumper, hood, doors and front end parts back in place, which will lower it a little more, but I would like to get another 6 inches out of the front end and 7 or so out of the back.
Back is going to be easy (flip, c-cut, and new lowering springs & shackles).

The front is where I am concerned. Has anybody done a 6' lower on the front? What combination did you use? Drop spindles limited to 2 1/2" or is there some more than that? Saw a 4" lowering spring but that sounds real drastic and would be concerned about the ride.

Here's a pic of my mock up and right now have 6" from top of tire to fender in front and have 7' from top of tire to fender in the back. I want the tires just up into the fender about an inch in the front.