Big-*** torque wrench is what I use, Summit/Jegs has 600ft-lb wrench for about $200, I used to borrow one from work but broke down and bought one a couple months ago. You can borrow mine heh, not sure which end of TN you're on but I'm just west of Conway, AR. You could probably wing it hitting that 406ft-lbs, like if you weigh 200lbs and have a 24" breaker bar but...I'd rather be on the safe side when it comes to suspension. Another plus about the torque wrench is that it's like 40" long so you can get plenty of leverage on it, even without a lift.