I feel that everyone is always talking down on the dinosaurs of the performance world, the 'old' pushrod V8's, since they are 50 year old designs.
Something to ponder... These engines (be it SBC, SBF, SBM, BBC, ect.) have been raced basically non stop for the last 60 years, and have been pushed, VERY hard. Countless men who have probably forgot more about engine theory than I will ever hope to learn in a lifetime have devoted their entire lives to extracting the maximum power out of them. With today's modern head designs, cam lobe designs (Tony D will contest that all cam designs are archaic, probably true), and intake designs being designed on computer, run through CFD, and CNC ported, exactly how much of that archaic 50's technology is left? And since everybody and their grandmother has either owned or driven a car powered by these old dogs, parts are unethically cheap. Cant quite be said about LSx parts yet (relatively of course).
Nelson racing engines still produces SBC engines that produce more horsepower on good ol' 93 octane than any DOT approved set of rubbers could ever apply to the asphalt before retiring in a fury of smoke. Once could even contest that the 5 bolt/cylinder head attachment design of the ol' dinosaur is superior to that of the LS.
Is the LSx a good engine? Without a doubt.
Should the good ol' SBC be discarded on lack of technology? You tell yourself that the next time you lose to one.
Just my .02