[MagicRat]

First of all, Spring Tech's spring lift is limited to 2 inches. I suspect that any more spring lift than this is not permissable given the limitations of the front end geometry.

But you would need to stick with the stock length shocks for this lift. Longer shocks may mean the front end would be over-extended and may damage the ball joints in the long run.

So, if you want more than 2 inches lift, you would need to get stock-length springs and lift spindles, which would be a lot more money.

Note, installing new front springs is still a big job for a beginner. You will need a floor jack and a spring compressor, and a ball joint separator. Note, this job can be DANGEROUS, because the old springs might fly out and take your head off when you separate the ball joint, unless you compress them properly.

As for the rear..... chances are, the rear of your truck is already higher than the front. You may be able to get away with a one-inch lift.
Imo, an add-a-leaf is fine but will make the rear end stiffer. Lift blocks will not do this.
Also, if you lift the rear too much using just springs, your handling and cornering will go to hell. Leaf springs with too much arch tend to wobble all over the place.

Lift blocks are fine if the total lift is kept reasonable. A 2-inch lift block is about the max safe lift for the back, imo.

Finally, your alternator amperage may be stamped on the housing.