Which conversion kit to buy?

I'm not trying to be a dick, but:
What's the delivered cost of that kit? 1300ish?
What's the delivered cost of a 73 up used kit, with freshly machined rotors, and caliper seals,new pads,and hoses? Maybe $400 tops?
That's a 900 dollar difference.
My net wages after paying taxes, government mandatory pension, mandatory unemployment insurance, and union dues, is about $15/hr.
900/15=60 hours for me. That's a week and a half! Almost 3% of a typical annual years income.
I'm very glad you have it to spend. And no, I'm not jealous, just saying.That would buy my kids a lot of grub.
Up here I can sometimes buy a complete donor car for $300.It might even have a 8.25 in it with a 4.5bc. If not, then for sure a 7.25 with a 4.5bc.

Honest I'm not trying to be a dick, I just don't have 60 hours to spend like that. I'm semi-retired now, and those 60 hours, represent for me 2.7 weeks work,5.2% of my annual income. Just saying.
I could spend an hour on the phone and those parts would be ready for pick up,by the time I got there.Maybe I'm blessed that way.
Jus-saying.