I've been looking at buying a deuce for about a month...well i found one that has everything that i want on it but a winch the air shift transfer case. the guy said for 650 he would throw in a winch and every nut and bolt to put it on and an air shift transfer case...so is it that easy just to change out the transfer case to an air shift one or what..( i know it HEAVY) but is that the only thing you have to do?