All I know is that when I used to get under the hood of my old '69 stingray, I didn't need a computer to tell me what to check or replace. Classics were fixed by feel and listening, not diagnostic computers and chips. It took talent and a learned skill to work on cars, not a college degree.
Your statement is flawed in that electronic diagnostics are a learned skill and the feel for tweaks is still a talent, and neither require a college degree. You either evolve with tech or get ran over by it.
Then again if you want simple why stop there, why not go back before we had multiple cylinder engines...who needs timing advance..back in my day we didnt need weights and springs to have a progressive timing curve the timing was static it was what it was.
Some old stats, not saying they are better, just stats, I bet those old bias ply tires wore out quick back then;
70 Buick 455 - 510 TQ
70 Chev 454 LS6 500 TQ
65-71 426 Hemi 490 TQ
66 - 69 Chev 427 435 HP
70 Chev 454 450 HP
65 Chev 396 425 HP
63 - 64 409 425 HP
63 Ford 427 425 HP
70 Hemi Cuda 13.10 @ 107
70 Chevelle SS454 13.12 @ 107
A lot more Hemis
70 Buick GS455 13.40 @ 105
69 Mach 1 13.6 @ 106
Now the super rare ones you could kind'a clone;
69 Camaro ZL-1 13.6 @ 110.21 (Museum stuff now)
69 Corvette ZL-1 10.89 @ 130 (Slicks) (Museum stuff also)
69 AMC AMX SS/G 11.0 @ 122 (I've seen one of these in SC somewhere, it's been year or 20)
Im not trying to be an ass, really Im not. But I am totally missing your point. Let me throw some other numbers at you:
2013 Mustang 5.0 420 HP/390 lb/ft - 1/4 mile 12.7 - 111 mph
Thats not super rare...and its kicking the super rare ZL1 on street tires. ANd it will get 28 mpg while doing it.
Wanna go super rare for a true comaprison..
2012 GT500 11.1 - 128 mph
And we are still talking about a 4 seat car.
Throw those super rare numbers up against a new vette and they look silly.
All this from a guy with a 65 in the garage while the wifes new 2013 sits in the rain.
From a guy who still gets misty eyed thinking about selling my black on black 69 mach 1 when I found out I was going to have my first child.
I am a classic car guy, through and through but if the goal is ultimate performance..give me a new car.
That said, there is no mistaking the skill it took to drive an old school 4 manual drum brake, manual steering unsynchronized 1st gear straight drive muscle car. To me its just like getting lucky in the back seat of a car, it was great at the time in high school, and sure its still fun every once and a while for nostalgia sake but for every day duty Ill take the modern car and the king sized bed