Welcome to IRV2. I think that changing just one U-bolt is fine. By leaving the other U-bolt in place, you don't have to worry about affecting the axle location on the leaf spring.
And, like me, you will probably find that a rear track bar is a significant improvement in handling.
Originally Posted by joe0508
I have enough threads on one of the u bolts but the other i dont.In this case can i just change out the one with not enough threads and leave the one that does have enough threads.I have a chevy p30/32 motorhome chassis with rear disk brakes
George Schweikle Lexington, KY
1999 Safari TREK 2830, FMCA 190830, Safari International chapter
1995 Safari TREK 2630, 1983 Winnebago Chieftain, 1976 Midas Mini