Leveling question: cheapest front end lift (not that spacer business)

Hey team, I'm looking to level my front end with the stock rear by not using the strut puck/spacer method. I will be running full steel skids and sliders which carry an approximate total weight of 300 lbs. What coil mated with stock OR Bilsteins or 5100 coilover set up will raise and support the front end 1 inch and not sag too much after awhile?

 

5100's set at 0.65


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How much taller is that spring vs the stoc one?

 

The elitist, yet truthful answer you don't want to hear is:

To accommodate that massive increase in weight hanging over the front end of your truck, in addition to gaining lift height, you need a properly matched and valved linear spring/shock combo. Coilovers are the easiest option, but are obviously stupid expensive.

I'm not sure if the stock springs are progressive, and if stiffer aftermarket replacement options are available to you.