What lift is this

What i'm asking is, sense the rear is already higher than the front when stock do i need to raise the rear to do the 2 1/2 on the front? I'm about to take a picture of the back but i'm pretty sure no lift was added to the back.

My goal is to lift the front to lvl the truck. Also to decide if i want or need to put 5100 on the back or just put them on the front.

 

That depends if the rear is more than 2.5 inches higher than the front right? Measure the difference and then you'll know what to get.

 

the lift in the pic is a block from Hell Bent Steal, they are a cheap way to lift your front end. I had them till i bought my SAWs. Honestly i havent noticed a huge difference yet, however i havent been wheeling since.

 

The problem is my truck isn't stock it has the spacers on the front so i can't mesure it but i figure there are a bunch of people with the 5100 on theirs so i thought someone might know. here are the pictures of the back.