The essence of a 70's road bike is beautiful to me, adding modern components like those deep V rims with odd spoking pattern ruins it and shouts "look at me", so it's really a matter of "taste". Then there's performance. Would those modern components perform better on a modern frame? Is the mod technology wasted when used on a low tech frame like the S.C.? Are you going to keep the cheap swaged SR crankset?
Is the mish-mosh of parts a matter of convenience or a matter of asserting ones free will? In either case, why ask for opinions and then do it anyway?