Outer Limits 4x4 Board

Got some shocks from a mate, they are promcomp es3000's. lenghts are 395 compressed and 640 fully extended. I have a 2inch spring lift and am putting in 2inch extended shackles. Will these be allright or not. They came out of a car with 4inch front springs. Also have the kit to invert the rear shocks. What model rancho's suit that arrangement.

depends ho wmuch flex ur front springs produce, why dont u throw em in and flex em up?????? btw rear shocks u at least want 14" extended, u might be able to get away with 12's but i reacon at least 14's or 15's, once again it more depends on the travel u get out of ur springs, get us a pick of it flexing up and im sure we could help out more for example 83 lux has 2" suspension lift and he uses ALL his shock travel pretty much, where when i had 3" suspension lifts using parabolics i wasnt even close to maxing out any of my shocks (btw now i have pretty much the same setup as 83 lux so now im using most of my shockies to, cept my rear needs to have final adjustments to be as good as 83lux's)