Examine the placement of the front springs before you go too far.
Your truck has "post-mount" springs, being mounts riveted to the frame.
The spring is outside the frame instead of being under the frame, as with the newer ones.
I don't know how well the mounts will hold up under a load which you will place on them.
It will be a matter of changing to "modern" under-frame mounts, at which time you can use almost any axle by modifying the spring perches.
By the way, the rear should also be post-mount, unless someone has already changed them.