Swap C-10 Frame for K-30?

[Apache'71]

I have a '71 Chevy C-10 LWB and a '79 Chevy K-30 LWB. I bought the K-30 for the axles. I know it would be the easiest to swap the axles under my '71 frame. Are there any reasons why I'd consider using the K-30 frame? Is it any stronger than the C-10 frame? The C-10 has a 6" lift now, but I want to go with a 8-10" lift. I know I can get a kit easily for a 73 and up that big, but would have to have custum leafs built to accomodate the '71 or move the rear shackles to accommodate a later model lift. Any thoughts?

Thanks.