i have a 99 250 superduty. Standard cab.am going to lift i'm not running bigger than 35" or 36" tires...not sure if i want a 4" or 6".. The truck already sit's higher than most f-250's probably because it's a standard cab ? but it does have blocks in rear that appear to be 3 1/2"...i was considering a 4" lift but want to keep the factory rake..Should i use a different rear block with the lift? Also if anyone has a similar setup with a pic i'd like to see it.

 

You should be Abe to fit them tires with a 2 inch lift. A shackle on the front and different block in the rear

 

I agree with Dave.