Success - my Apple 1 Terminal Circuit is working.
Changed the 74LS161AN in D8 to 74161, and both C4 and C14 74LS157 to 74157.
Many thanks for the many people who have helped me get to this point.Looking at Post #21 of french-ie-newb-ie-apple-one-ie I'm only half way as the Microprocessor part is not working.
I fould an "old school" electronics store in Melbourne, so on Monday I will see which other ICs they have.
My mainboard is fully populated.
I connected a multimeter between GND and 6502 Pin40 and pressing RESET voltage goes from 5.01V to 0.02V.