I messed up my pully trying to tap it off with a hammer. I chipped the
edge of it. I was told I knock the balance off it by doing that, and I needed
a new one. I was looking on e-bay and found some real cheap underdrive
pully just for the crank. Does anyone have any info on this type of pully.
Has anyone used this type of pully? I am thinking of a purchase, unless
someone says otherwise.

http://cgi.ebay.com/ebaymotors/BILLE...QQcmdZViewItem

 

LT1 is internally balanced... as long as the pulley works, it works.

That pulley you posted is one of those piggy-back pulleys anyways, still needs the stocker bolted on.

I love how the ebay says the billet pulley equals less weight, when it still uses the factory pulley.

 

Wait, why would it still need the stock pulley? It looks like it has everything to bolt up the hub?

 

But its looks like its only a "pulley". And its priced like its only a "pulley". The stock piece is both a "pulley" and a "harmonic damper". You need the damper to continue to function, so you pull the stock integrated pulley/damper off, sandwich the U/D pulley behind it and put the stock piece back on, to help keep your crankshaft in one piece. As Javier pointed out, you just added weight.