BOOST FED 95Z

Hey guys, I am a little confused about something. I have a forged 357 ci in a 95 z28. When we started the car, it had an AWFUL vibration! We took the motor back out and had it rebalanced. When it was balanced they used a stock crank pulley. I have since ordered a t-trim. Do I need to have it rebalanced w/ the pulley that comes w/ the t-trim? They had to take a little weight off of the stock pulley to get it in balance. The shop where the car is says I need to have it rebalanced again w/ the pulley from vortech. If I dont need this I dont want to do it but If it needs to be done, i need to go ahead and do it while the motor is apart. What I was wondering is if you guys thought the machine shop could match the drill's from the stock crank pulley and measure exact to put on my vortech pulley? This would save me tons of money and also time.
Thanks
Scott