you could see if what your car does only using koni yellow cossie struts and the springs you use rightnow. the cossie struts are a bit shorter than 4i ones (witch are just the same as all the non cossie or non 4x4 shocks), but the only thing is, the disc where the spring is on, on the lower side, might hit your tire or rim. i used 5 mm spacers on my dohc sierra mk2, and it was very low, and it drove very well.

i've got koni yellow and 40 mm lowering springs on my 4i, but still the normal brakes, will upgrade to cossie sometime, got the hubs and tca's and such laying around, but i might just fit the cossie brakes on my 4i hubs, saves me another day of laying around below my car shouting and mumbling becouse its a lousy job to replace the hubs.

also, if you use cossie 2wd 4 pods, use braided lines like dojj says, quite a different feel than the original rubber crap lines!