My '56 Chevy 2wd pickup had a solid I-beam axle with the leaf spring shackles up front and the solid eyes to the rear..thing rode like s***!..felt like every bump was trying to drive the springs rearward into the solid bushings..
My friends nick-named the truck "Bam-Bam" because thats how it sounded going over bumps..
I'm not so sure it would have rode better had they been set up the other way either though..it had like 5 leafs up front,they were "flat",hardly any arch,and they didn't flex very easily..I put new Monroe Magnum 60 shocks on it,made hardly any difference..