I am using a 1969 Camaro 327 engine base 210hp in my 1948 International Harvester pickup build. I have a vibration when I rev the engine from idle. I think I have the wrong balancer on it. I am having a problem tying down exactly what the original size was. I have the short water pump and my engine is rebuilt with a mild cam and added Edelbrock 4 barrel carb and manifold with headers. That is all after stock added. It is a great running engine but I installed a new balancer when I got it back from the rebuilder that was supposed to be correct. Now when I look up the one I have installed, the 6 3/4 Inch Diameter, 2 3/8 Inch Width unit, it says it's for for GMC Chevy C K 1500 Pickup Truck Van Pontiac Oldsmobile V8 and not for my engine.
Can anyone point me in the right direction? Looking at different websites like Heartbeat City and others, they don't show one for a 1969 327 base. Is it odd or rare? Summit Racing shows several but in different sizes?
Thanks Bob

 

This one should work and not uncommon.
https://www.rockauto.com/en/moreinfo...321232&jsn=501

Basically, as long as it has no extra weight about the inside circumference, neutral balance, most any diameter will work.

 

https://books.google.com/books?id=Mr...0guide&f=false