i'm building up my motor for a big turbo setup and i know the stock ignition might not be up to par for my plans, but i was wondering if i would need a whole ignition box w/coil or can i just get a upgraded coil?

 

I'd recommend getting the box and the coil. Depending on how much power you are going to put down... I think after market ignitions are insurance when you have high power N/A or turbo motor.

 

Ignitions are relatively cheap and if you're running more than 6 psi of boost then it's worth it to upgrade. Your choice of MSD ignitions coupled with a MSD HV coil will do fine.

 

why wouldn't a coil surfice?