You did not say if your oneton is a dual rear wheel or a single rear wheel. This is what I did with a 55.2 dual rear wheel oneton.

292 I6 with a stock 4 sp. I replaced the stock rear axle with one from a early 70s 3/4 ton. It was the high GVW with the large brakes. This rear end was from an automatic trans truck. I am not sure what the ratio was but most likely 4.10 or maybe 3.73. This pickup rear end was close to the stock rear end in width. I replaced the wheel studs with longer ones for the dual wheels and changed the spring mounts. It worked out very nice.

If you have a oneton pickup this will not work well as the rear end will most likely be too wide.

54 Chevy build pics.