Ah, stock shocks from a 94 F-250 would probably work, that is what I run on mine. However, each vehicle usually is a little bit different so you will want to measure for yourself.
Put your lift kit on then jack up your axle on one side all the way, stuffing your tire into the wheel well as much as possible. Then measure the travel from shock tower to the lower shock mount. Next, use a high lift or similar system to cause as much drop as possible. Once your suspension is flexed out measure the distance a second time. Now that you have the two numbers head down to the local parts store and borrow their shock book. You can find a set of shocks that fit your vehicle. Make sure you give yourself at least 1/2" of play on the up stroke, preferable on the down stroke as well.