I got a stupid question

67Dart273 said
And......look at the balancer. 360s' have a huge "off balance" around the balancer, others don't.
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Others like a '72/3 340 do.

67Dart273 said
Other than that...........as above.........look on the side of the block for casting nu's. These are sometimes difficult. My recollection is that a 340 is hidden by the manifold / starter / head pipe "pretty well."
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They can be difficult, usually possible though.