Six inches is a lot of chop... Is the chop complete? The doors done, and you're sure everything is sorted out and going to work?

How tall are you? An average size guy will probably be fine, but a tall guy is going to be cramped in that cab.

On a 1/2-ton the rear axle is mounted on top of the springs. On a '49 through '54 it was mounted using a rotating mount that allowed the axle to move on the springs. That changed in '55.

On a 3/4-ton I'm pretty sure the axle is mounted UNDER the springs. I know it is on a 1-ton but I don't currently have a 3/4-ton, so I can't just run out and look. On the 3/4- and bigger the axle the axle is mounted solid to the axle and at least the back half of the dirveline is open instead of closed like the pre '55 1/2-ton.

So what does all this mean for your project? Put the rear axle on TOP of the springs for a starter. That lowers it quite a bit to begin with.

Your 3/4-ton front has 8-lug hubs that are difficult to convert to disk brakes. You're running a chopped top and lowering the truck. You probably don't care about the 3/4-ton load rating.

You might look for a 1/2-ton front axle allowing you to convert to car type front disks using a kit. That probably puts 5 x 4.75 hubs on the front. Then you can have your rear axle redrilled to that pattern instead of the Ford pattern.

There is more to all this but a few paragraphs, but this is one approach you could chase. If you are on a budget I don't think there is a cheaper approach that doesn't including lucking into free parts. Of course a free 9-inch Ford suggests you might be able to do that.

Keep coming back with updates and questions.

1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...