very hard, which is why I chose the suspension package I did. I talked to numerous chassis experts, proffessionals such as ron sutton, fat man fab, Gerst, Bill Rielly the list goes on. My cousin is a suspension engineer with Andretti Racing, he works their rally car program mostly but he was quite impressed with what's being set up. My suspension is custom built, custom designed. At least the rear is, the front is a GTS kit with tons of adjustibility. The rear, nobody, i mean nobody offered what I needed or wanted in the rear kit. So I contacted GTS, told them what I needed done, Carl did the rest. I should have it installed in the next few weeks so I wont say much more than it is the most adjustable rear suspension I've seen for a mopar A body.