I got a 01 Dodge Ram 1500 4x4,its ridin on 35's.Its got 2 blocks under the leaf springs in the rear and the blocks are 4 inch and 3 inch.Now does this mean the rear end has a 7 inch lift.What about the front,would the front be the same size?Because the truck is level.The fron also has spings coil over shock design.I need help determining the height of my lift.

current height - stock height = lift gained!!!:flipoff2:

BTW, lift blocks are crap anyway, but 2 stacked on top of one another is very dangerous.

Sounds like some mickey mouse shit to me.
As previously stated, stacking lift blocks is very dangerous, and I would personally get rid of both and use a shackle flip and some fender trimming to clear those 35s.

OEM block is 3.5" tall. You cannot get rid of the OEM block on the 1500's wihtout replacing the perch or going to a small block with the bottom milled. The reason being that the 1500 perches are not flat, they infact all are slightly rounded. You would need to mill a small block to match the bottom of the OEM block if you want to avoid new perches.