find a set of used rear springs, take them apart (remove the bolt that ties the leaves together) and do the same with her front springs, then add 1 or 2 of the rears under the top two leaves of the front pack, this keeps the axle in the stock position but will give some "spring" to the front end again without lifting it too much that she cant get in with her bad back
i would also add one of those extra leaves into the rear pack so it stays level front to back
i had a friend do that J arm ball flip and both Jarms he did it to broke