Hello, I am new to this sight so bare with me. I was looking at a 3' suspension lift on ebay that consits of rear blocks and front keys. Any on tryed one? what do you think of it? any problems? Or should I seddel with a body lift?

 

I would not use aftermarket torsion bar keys. THey allow you to put way, way too much preload on the torsion bars which leads to increased wear and tear on your ball joints and cv joints and destroys your ride quality. I would just crank up the preload on the torsion bars with the OEM adjustment keys.
A body lift would be a much better choice.