another 2 piece rotor questions

[70lt1z28]

on a 69 L78 camaro, do they all call for 2 piece rotors? or is there a cut off date where 1 piece rotors  became standard on the car??
thank you in advance

[68Zproject]

The 69 model year was the cut off.  69s had different calipers than 68s.

[hihorse]

 My late february L78 car had 2 piece rotors.

[NHBandit]

As I stated in another post, my 54k mile 69 Z (with single piston calipers of course) had it's original 2 piece rotors on it that it was born with. I don't believe that when they went to the single piston calipers they changed to the one piece rotors. My car was an 04C built car. What do the experts say on this ?

[Jerry@CHP]

Two piece rotors were used in 1970 and later too.

Jerry

[johnturner]

I know that the Chevelles switched from the 2-piece rotors to the 1-piece around February 1970.

[firstgenaddict]

all Chevelle Assembly plants or are there particular plants?

[johnturner]

I would guess that all assembly plants switched around this time, but I was working with a Baltimore built Chevelle when I discovered this info.