Replacing Torson Keys

Hey guys. I have been working on my 1950 chevy 3600 truck and have since put a 4wd s10 frame under it. The body fits on just fine and every thing looks good. I am now in the process of a suspension drop on the truck. For the rear i just used belltech 3 inch drop leafs and 1 inch blocks. For the front i have loosened the torsion bar bolts and droped about two inches in the front. I need just about 2 more inches in the front and the 50 chevy will be sitting nice and low. I just ordered drop torson keys (Should give 1 - 2 more inches in the front) and i was wondering if any of you guys knew how to replace the old keys. I have the instructions for replacing them but any tips or tricks would be greatly appreciated.

Thanks,
Tyler