Does the '76 have Fadecs, and how is Flex thrust set on take-off ? The '73 Classic requires PM to set the thrust manually for example.
Have flown the Classic for quite a while. Manual thrust setting was not required, except for the usual initial partial thrust (same as on the airbus actually), the rest was done by the autothrottle. No idea if very early MSNs had a different procedure. So no, manual take off thrust setting is not required usually. And yes, no FADEC needed for that.