i am ordering 3 inch lift keys on ebay and alot of people from my work have been telling me i have to change my upper contol arms in order to put the 3 inch keys on i dont know if this is true or not anyone has done this before i would appreciate some pointers.

 

What vehicle is this for?
and really you do not need new keys unless your T-bar screws are cranked all the way in due to sagging. But normally you no not want to lift the front more then 1.5-2 inches or you will have horrible ball-joint angle at the top and steep cv-joint angles. You will only need aftermarket a-arms if you can not get the wheels properly aligned. If you cant you may try swapping the upper ball-joint to under the upper a-arm.

 

+1 on what Karcinagin said. Normally you can go past maximum safe lift with the factory keys, so aftermarket keys are a waste of money. Even at 2" extra lift in the front many people find that the CV joints will bind as the suspension droops as it goes over bumps. If you lift that much you'll find that you chew through ball joints and CV's at least once a year.

 

Yeah I got a kit that had the keys and never used them. I had tons of adjustment left on the stock keys.

Save your $40 and get just the rear shackles, then take it for an alignment and have the mechanic crank the front up as much as the specs on the computer will allow.

 

Its on my 95 chevy blazer and i went to tire barn to have in aligned and they said they could not align it with the stock torsion keys cranked that i had to get the lift keys.

 

Well they are lazy and just do not want to give it an alignment, try a different shop.

 

+1 to rich.
t-keys do effect alignment, but in the opposite way. when you crank in the keys, you will wear out the OUTSIDE edge of the front tires. then they would have to adjust the a-arms to compensate for the positive camber that you added when you cranked the keys. so if you buy new keys and install them, and crank them all the way in, which i wouldnt recommend, you will have more lift, there is no denying that. but you will also have many suspension problems.

 

Ok so i would probably be the safest by just getting the rough country 2.5 in lift kit and do it right.