Welcome to LOST!
What's your location, there may be someone nearby who can look at your rig to see what the problem could be on why your blowing out UBJ's, if nothing else, post up a pic of your front end.
5" of BS is to much for that size tire, 4" on a 7" rim being optimal. Shouldn't be enough to kill the BJ's on there own, but it may contribute, especially if there is binding or rubbing at some point. How long has the Frankenlift been on the Jeep, how long have you had the UCA's on, and where they new? Good news is with the Al's arms, the UBJ is cheap to replace.