Re: Z28 302 and 350 balancer question
 

L79 engine option ended in 1968. This balancer is dated December of 1968 making it a 1969 balancer

Re: Z28 302 and 350 balancer question
 

Please explain offset keyway .Offset from TDC line ?

Re: Z28 302 and 350 balancer question
 

Through 1968, the timing index line on the outer ring was exactly in line with the keyway; when the new long-water pump accessory drive came along in 1969, the timing index line was moved 10* counter-clockwise from the 1968 position, along with the tab on the timing cover. Attached photo shows both index line positions on the balancer.

https://www.yenko.net/ubbthreads/imag...lins/beers.gif

Re: Z28 302 and 350 balancer question
 

Thank you for that info John .