Leaf Spring Questions

[Super_Dave]

On my '74 C20 project, I am going with the C20 to C10 2.5" drop spindle kit. I am removing the 14bolt rear end and swapping in a '79 12bolt. I got the '79 after the dude cut off the spring perches, so I have to order a set. My questions:

(1) If I remove some of the leaves from the C20 leaf pack and delete the overload springs, can I use the C20 springs or should I go with some C10 springs?

(2) If I go with C10 springs, are the eyes the same width and diameter? Do I have to swap out the hangers and shackles or can I keep the C20 hangers and shackles?

(3) Are there differences in the spring perches that I need to consider before ordering?

Thanks in advance.

Dave