A Body Disc Brake Swap 101

I have a 65 barracuda that's a 10 inch drum brake car. My lower ball joints are shot. I have a 73+ disk brake swap in the garage and running 5x4.5 wheels with adapters on car already.

Now my questions are: Can I use the lower ball joints from the 73+ disc swap with my 65 barracuda lower control arms with the disc swap or do I HAVE to use the 65 lower ball joints with the 73+ spindles?

For the cost of 2 lower 65 barracuda ball joints I can buy new calipers, pads, and wheel bearings to put on my 73+ disc swap.

My disc swap has good ball joints and upper control arm Bushings and came with good soft lines I could use. I'd prefer to use the soft brake lines on my car as they are brand new, just not sure if they will work.

I've searched and cant find a clear answer. So thanks in advance for any advice offered. I'd prefer to here fro the guys that have done the swap on there early As as I know they have a few different quirks to there setups