The thing about 70s manga in general is that mangaka were much more crazy, relatively speaking, back then. The mangaka of Gaki Taisho even mentions in that recent NHK special how he's surprised that manga was run. Nowadays, readers will thoroughly read series but back then, it was largely for kids so entertainment was given first priority. I tried Kinnikuman from the beginning but stuff began not making sense. Cobra was quite interesting though, there were also other reasons why

. This was something I saw up till the 90s. Sakigake for example didn't give a damn about a coherent plot in the beginning. Still, the amount of heat in those series is undeniable so I'll probably get back to them soon. Harenchi Gakuen is the one series I cannot find no matter how I try. I found other versions of Harenchi Gakuen but the original is an mythical pokemon.