360 flywheel

I bought an 11" flywheel off of ebay. Before I bid on it I emailed the sell as to what it came off of. The reply was an '86 360. Now, I'm looking at a flywheel that does not have the 1-13/64 x .66 deep holes the Mopar Manuel says it should have. The flywheel addressed in the manuel is a '74 360 10.5" flywheel. Are the '86 11" flywheels balanced different? Do I need to use the balancer off of the '86 360? Thanks.



Phillip