First thing i should notice the factory paint corperatiom blue should be on and i was told it was push in type wire holders and rest older clip in type correct me if i am wrong.
They look like this from 1970 -1973 The only difference was the color. Drivers side has a tall spark plug wire holder to clear 4bbl linkage. The passenger side has a large wire harness and vacuum hose holder on the intake side not just the small loom holders like a 2bbl style but a wide one as pictured.
I found a pair swap meet in reno last weekend so i compare with other pairs tree stand moved back and other small tree located different location maybe i am wrong.