Authenticity opinions

I have brought my SWTPC 6800 system back to life that I built as a kid in 1976. It is pretty heavily loaded with RAM cards, floppy controller, etc. and the 8V power supply rail was never really able to hold its own. It sits at about 6.5V now... driving many 5V regulators on the various cards. No where near enough margin going into those. So, I am contemplating the following, 1) rebuild entire power supply using three switchers, 7.5v unit nudged up to 8V and two 12V units to supply +/-12 on the backplane. All of these will fit inside the original cabinet in place of the linear supply's transformer, giant electrolytic cap, bridge rectifier, etc. I'd mount these switchers to an aluminum plate that would fit into the chassis and use existing mounting holes thereby not drilling any new holes in the chassis. This would be the least "period" solution but allow all of the original cards to run in the machine with power to spare.