You can get a cluster for pretty cheap on the evilbays you can retrofit and not have to worry about running without one in the meantime. And if you booger something up you won't have ruined your original cluster.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.