Hey Hans, Do I see numbers stamped on the left rear flange that the bell housing bolts up to, circled in red. Right side of picture of the engine in the picture. If so what are the numbers?I see now all three are with the older oil filter insert. One has to be an early Giulia 0526A. The other 2 are Giulietta.
The Picture is Giulia
1969 models have a pre-heat tube for the air filter. It gets the warm air from a plate mounted close to the block. This plate covers the cast in pad for the motor number, so Alfa just began stamping the numbers on the trans pad.Cool ... I wonder why they changed location?