First of all get rid of the 3" body lift, that should bring you down to 7" if i understand you right. Next find out how it is lifted. to my knowledge there are no 7" lift kits made, it may be a combination of a 2 1/2" springs and a SOA conversion or something involving huge shackles. whatever the case, you should be able to remove a portion of the lift to get it down from the clouds. If you came to that 10" by measuring from the ground to the bumper and comparing it to a stock jeep then dont forget to take into account the larger tires.
Anyway it sounds like you may have everything you need for parts, just too much of it, exept for the correct length shocks.
If it is some huge homegrown set of stilts then you may be better off scrapping it and buying a kit. I have a sky jacker softride that came with shocks for around $400.-$500.that works nice and is easy to install.
just my .02 cents
Another crazy bastard who runs into a fire when everone else is running out!
1982 cj7. Frame off. shell valley kevlar body, stainless hinges, Bestop seats and supertop, KC titanium lights, Homemade swing out tire carrier with spare front wheel bearings/hub, Built 304,DUI,Edelbrock shorty headers with dual stainless 21/2 tubes into incynerator cans 21/4 dumped out the back,Edelbrock 600cfm, performer intake and cam, Borgeson lower column, Centerforce clutch, NV-4500, Dana 300 w/custom built twin stick, Homade 1/4" steel skid plate, 2.5 soft ride w/ 1" shackle lift, 33x12.5 mtr's. Stainless fuel and brake lines, Braided hoses. more...