Ok so, basically my idea is to use tacoma strut assemblies for my 2000 Honda Passport. I'm tired of the crappy ride. I'm a engineering student so I got the skills. I want to know if I can convert my torsion suspended front suspension to coilovers. Couldn't I theoretically install a coilover on the shock mount, beefing up the lower shock mount and fabbing an upper mount. Would this still keep the same geometry? I might have to modify the upper a-arm to allow the coil to go through it. Does anyone know how to find out the spring rate of a tacoma strut assembly. And does anybody know how to get plans for my truck. I'm really good at 3D design and if I could model my truck, It would make it easier. Thanks for the help and opinions.  

Do a web search on Honda Passport off road.  Didn't know anything was offered for those, LOL.  You may find the answer you are looking for on one of those web sites.  Even JC Whitney has lift kits for them.  

What i'm saying is does my idea seem possible. There are only two lift kits out in the market, Calmini and Independent4x. I want to try something different.  

I read an article of this already.  It is really expensive and takes alot of time.  THINK TWICE, CUT ONCE kinda stuff.  Your engineering skills will come into play by converting from a 4runner/pickup to a passport but here is the link
http://www.fourwheeler.com/brandpages/129_0501_toyota_ifs_truck_suspension/index.html