55.2-59 Rear suspension

[bosco]

Looking for options to soften the rear suspension from the buckboard ride it is today. 56 with the original rear leaf springs. Looking at a 4 link triangular with coil overs (very pricey option though). Will newer leaf springs be any better for the ride? My current truck (daily driver) has leaf springs, but it rides very nice, no bucking up and down. Thoughts, or is this just the way our classic trucks ride without the change to a 4 link. Thank guys.