Balancing of stroker kits and vibrations

I checked the converter, flex plate, and balancer way before pulling the engine. They all seem to be a neutral balance. The crank bought new has a 2050 gram bob weight. After digging into this a bit deeper my crank seems to be balanced with holes drilled and material removed from the counter weights. Seems to indicate to me some sort of balancing job took place. Assuming a bob weight of 1700-1800 as mentioned above. It would make sense to remove weight rather than add to the counter balances on the crank. Maybe it just wasn't done right.

I'm going to call my crank guy in the morning and see if it's fixable. If it is then it will be getting rebalanced.

Cranks are a little pricey around $400 for cast and $1,000 for forged. Add another couple hundred for each if you go through M.P.