69 Z-28 Balancer question

[69L78Post]

What's the correct part# for a 69 302 harmonic balancer? A friend of mine is collecting parts for his Z and is wondering if he has the correct one or not.

Thanks,
Barry

[Mr.Nickey Nova]

Part# 3947708 and is 8" in dia.

[Salvatore]

Post a picture and we will tell you. The timing marks are offset. Assembly line balancers are different looking than the NOS or over the counter part.

[69L78Post]

Thanks Mark and Sam. I'll see if I can get Al to send me a picture to post.

[L78steve]

[ QUOTE ]
Post a picture and we will tell you. The timing marks are offset. Assembly line balancers are different looking than the NOS or over the counter part.

[/ QUOTE ]
Offset from what?

[John Brown]

The 69 timing mark is offset from the keyway groove. The 68 and earlier balancers have the timing mark directly in line with the keyway.

[Fast67VelleN2O]

Here is an original 1969 7708M assembly line installed balancer.

[L78steve]

[ QUOTE ]
The 69 timing mark is offset from the keyway groove. The 68 and earlier balancers have the timing mark directly in line with the keyway. [/quote
So I have this correct in my head, The 68 and earlier crank keyway is cut pointing towards #1 TDC and the 69 up crank keyway is straight up at #1 TDC.