Saving 71 Demon...

Well.. first off I have building gm muscle cars for almost 2 decades.. Mostly chevelles.. Daughter loves the early 70's buicks and they are ok yet for multiple reasons I wont go into I will not build one. My first car was a 73 Sport with a slant 6 that I could not kill.. Recently found this 71 Demon and it appears daughter (she is 29) really likes the car.. so.. It will be very mild build street car 340/727/8.75 that is used for cruise ins and local shows..(dad might push it a pass or two just for giggles). Starting this thread and I am sure the questions will be rolling out as we go.. I have a few questions to start off.. I am frugal but not cheap and I am not rich but do things as correct/safe as possible. I have been searching and reading forums here for sometime and have a general idea of what I want to do, although some posts are older I figured I would see current opinions/options.

Going to upgrade to power/larger bolt pattern disc brakes up front (rear end susp/diff/brakes will be next) I know there are many ways to accomplish this, attempting to go plug and play up front although open to suggestions.

K member is out going to rebuild entire front suspension and have it ready.

1. Lower control arms, new bush and go or upgrade pin/reinforce kit?
2. Figured upper control arm swap (like better geometry) I will go tubular, what brand for easy fitting swap?
3. Strut rods.. figure adjustable to help with geometry.. best fitting/easy install brand?
4. Good quality brake kit for the front? No need for wilwood and I know everything is chinesium who's chinesium kits are decent?
5. Lots of torsion bars out there.. street machine does brand matter and what brand might that be?

Pulled a pic off my phone from when I was covering her when I got her home..

Demon.jpg