i changed my rotor of a 95 that was broke and i put a 94 rotor on it and it missed the only difference that i can tell is there is a 1 on the 94 and a 2 on the 95 i dont want to have to by a new cap and rotor kit because the cap is new from gm. any info on this would be very helpful thank you.

 

94 is a non vented opti
95 up is a vented opti
that would be the only difference i could see,i have heard of people using the vented cap and rotor on the non vented unit but NEVER actually seen it done.