One problem is Fiat did not put the part numbers (or any identifier for that matter) on their cams. So you can't tell what it is without careful measurement.
Also, it is my understanding (but I could be wrong) that the "128 Rally cam" is not the preferred
The 128 coupe and rally are both 24/68 64/28 cams PN 4331512. The late 1500 X1/9 cam is also a 24/68 64/28 camshaft PN 4333059.
The 1512 and the 3059s are
the only "Euro cams" that offer any performance increase to our cars.
Any and all other oem stock cams (European or not) are either the same, very close, or slightly better then the standard US spec cams, and are not worth the effort or cost to swap. That also includes the '74 US cam.
128 Coupe 1290cc Type 128AC.000
24/68 64/28 (checked at 0.50mm)
9.75mm gross lift
Running clearance 0.40mm inlet 0.45mm exhaust
Nett Lift 9.35mm inlet 9.30mm exhaust
"Specifications and Features" Nov 1971
128 Rally 1290cc Type 128AR.000
24/68 64/28 (checked at 0.50mm)
9.75mm gross lift
Running clearance 0.40mm inlet 0.45mm exhaust
Nett Lift 9.35mm inlet 9.30mm exhaust
"Specifications and Features" Jan 1972
128 coupe / X1/9 1300 (75hp) 24/68 64/28 lift at the valve (no play) 9.75mm for intake / exhaust (Fiat part number 4331512)
X1/9 1500 carburettor (85cv) 24/68 64 28 lift at the valve (no play) 9.85 inlet 9.90 exhaust (Fiat part number 4333059)