Aftermarket gauges into stock bezel? (64 Valiant)

I have a 64, and the "guages" are part of the charging system, or so I've been told, found a you-tube site that shows how to fix this SCREWY-SYSTEM!!! and then the after market gauges may work for ya,,,,,REALLY BAD SYSTEM ,,,half the time gagues DON'T WORK RIGHT !!!