Installing Wilwood Big Brake kit

[Bandit]

Anyone have experience installing a Wilwood front kit which requires modifying the stock spindles? The kit comes with pretty decent instructions, but the procedure has me nervous because it calls for cutting off portions of the spindle.
I am just wondering if any of you guys have done this, had success/problems in certain areas, and could give me any tips to help me with a clean install.

Wilwood 12.65" crossdrilled/slotted
4-piston calipers
Going on 1980 Trans am

Thanks
Paul