Doetsch Tech shocks are stiff, their angles are pretty steep too. But 1st up trim the bump stops 1 inch+. That will then literally free up the springs to see how they feel.
You need something like this under the front; Front springs about 315 pounds per inch 3.5 inches compression at load 3 more inches to bump stop Shock centered in travel range (shock travel 7.5 inches)
hi my name is shawn i also have 60 f100 if you like the low look but want a like new drive go to droppedaxles.com