Harmonic Balancer ?'s

[atomicjoe23]

I hopped on the auto parts website yesterday and the website described the harmonic balancer as neutral balance?

What exactly does that mean?

I know there is an externally balanced and an internally balanced harmonic balancer (referring to how the engine is balanced). . .I am assuming that "neutral balance" is referring to one of the two, but I don't know which one.

This is for a mid 70's 350 SBC ('75 Chevy K20 4x4). . .speaking of is this engine internally balanced or externally balanced?

Does the diameter of the balancer really matter? I see several different varieties available. . .6" 6 3/4", 8", etc.

I would like to replace the balancer on this engine because it's pretty old and I'm replacing pretty much all the other external parts on the engine so I might as well replace the balancer as well.

Thanks for the help!

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[freeride]

a "neutral balance" balancer is used on an internally balanced motor. an externally balanced motor would require the wieght to be added to the balancer, it would be listed as something like "28oz imbalance".

i'm not sure about sbc being in or ex, i'm sure google could tell you.

[atomicjoe23]

I thought that neutral balance was referring to an internally balanced engine, but I just wanted to make sure.

Thanks!