Alternator, Regulator & E.C.U.

Thanks for the reply, sorry I wasn't specific. The alternator is a squareback, vintage unknown, but with one field grounded so it can work with the original wiring. There's no reason to change the alt, it's been working fine. I just need to remove the wire from the second field tab to use both field wires, the flat pack regulator, the four pin ballast, and the five pin engine controller. I'm just wondering if ditching the four pin E.C.U. and the ballast and regulator that are already installed is worth the time and expense.