CPP modular dropped spindles

[Someday]

Hello all,

I haven't been able to do much to my truck lately, so I have been MIA from here for awhile.

I am looking to lower my truck using CPP's modular dropped spindle. (I want to upgrade to bigger rims down the road) I have received some conflicting information on whether these will work on my stock disc brake set up. I was told it will work only if I have the heavy 1/2 ton discs. I was also told it will work on my set up because my discs are 1.25"

My questions:

Anyone use the modular dropped spindle using stock 1971-72 disc brake set up? If so did you have to change out/upgrade ball joints? Any modifications needed?

Is there such thing as heavy 1/2 ton discs on a 1971-72? I measured mine and they are 1.25" Did 1971-72 ever come with 1" discs?

Thank you for any help. I searched the forums before posting and could not find my answers.

Jeremy