are these blue stripe or blue tip push rods for a Z-28 motor ??

[motorman]

if these are real GM blue striped push rods they will not wear where they go thru the heads as they are case hardened. no documentation just 40 years of building race engines

[z28z11]

if these are real GM blue striped push rods they will not wear where they go thru the heads as they are case hardened. no documentation just 40 years of building race engines

Maybe I shouldn't describe as wear - but they get a "polish" where they ride through the heads after time and use - both sets carry the remnants of the blue stripe, "O" rockers; 186 heads original to the '69,  no guide plates. They can't help incidental contact with the heads over time - even hardened steel will abrade with that much contact and action over years of use. Just my opinion -

Regards,
Steve

[69Z28-RS]

Steve,

If Clem (the Motorman) tells you something about engines or carburetors...  you can 'take it to the bank'..