im wanting to add a 3inch body lift and 2inch suspension lift to my 03 fx4 ext cab...to run 315 or 35's...

after searching around a bit...im not sure which angle to approach the rear lift.....im wanting to try the reindexed torsion keys that you can get on ebay and am wanting to go with a block in the rear...if i get the kits they offer i would have to stack blocks to get a 4inch lift which is illegal....

i can get a 4.5" block with ubolts through skyjacker and rip out my stock block giving me about 2-2.5 inchs over stock height....would taking out the stock block and putting in a 4.5" be too high for my plans up front??? i dont want the truck to sit with its butt in the air!!

they also offer a 3.5" block (1.5 over stock) would i be better off with this one??

 

I'm not a fan of the aftermarket torsion bar keyways, but I would go with a larger block in the rear. I'd remove the stock 2 inch block and replace it with a taller one. The 3.5 inch block should be tall enough.