I have been having timing issues on my 71 Cutlass and my 70 Vista Cruiser, both 350's, so I checked both harmonic balancers to see if they had slipped or spun. I used a screwdriver in the #1 spark plug hole. The 71 was just about perfect but the 70 I think has slipped, which explains why it spark knocks something terrible when set anywhere near where it's supposed to be. So I went out to my 72 Cutlass parts car and removed the balancer from it and put it on the bench and after cleaning off the crud I can see the marks that are on the hub and the weight are exact so I can tell it hasn't slipped. I also removed the dist cap on the Vista, and found I have about 10 degrees movement in my timing chain so I defiantly need to replace the chain. My question is can I use the balancer off the 72 on the 70? The 71 and 72 are thicker than the one on the 70. Thanks for your advice, Greg.

 

Anyone know about this? Thanks, Greg

 

Go ahead and use it.