question on leafs between 1/2 and 3/4 ton

[68jimmy]

I'm wanting to replace the suspension setup on my lwb gmc 3/4 ton with a 1/2 ton setup... I think I have the front figured out but I have a question or two about the rear.

1. Will the rear leafs from a swb fit?
2. Can I use the original heavy rear axle with the lighter springs until I find a suitable donor?

3. Is there any good site out there that outlines a 3/4 to 1/2 conversion?

Thanks in advance!

donovan