Adding a brake booster?

See ebay for booster/MC/brackets. Was ~$140 last I saw. Most use a GM booster & cast-iron MC.
Before those were avail, I put booster brackets from a 74 Slant on my 65 Dart & booster-MC from a 95-99 Breeze ABS.
You don't need a booster w/ drums. Easier to switch to a 7/8" booster w/ 2-4 bolt adapter plate ($30 ebay). Dr Diff sells a kit.
Many say they don't need a booster w/ front disks, though most all new cars today have one.
Cheapest front disk conversion is Scarebird. Many use Wilwood ($$$).