use 2wd running gear other than the hubs, use 4wd hubs with the shfats removed but the cv's in place

if you mix and match the 2 and 4wd front end you will get all sorts of steering issues because the 2wd and 4wd have different steering set ups and different steering geometry

make suer you use the correct stuff with other stuff as the arb's are different angles and the crossmember may give you different setups

and don't forget that there were around 17 different spring sets of rht esierra as the 4wd ones had extra weight and also there was the air con models and left and right hand drive versions but all after market setups use the same sized springs left and right