Me personally, I'm not a fan of originality. Times and technologies have changed and stock leaves much to be desired in a daily driver.
Things like turbo chargers, disc brakes with slotted and crossdrilled rotors, front AND rear sway bars, polygraphite bushings... The list goes on.
That being said, keep the stock gauge cluster and if you need, do something neat to it like color match it to the interior. They just look cooler!!! How many cars have you ever seen with a sweeping style speedometer? Few. How many have you seen with a speedo that rotates in a clockwise fashion? Too many.
How many speedos have you seen rotate counter-clockwise? Depends upon how many AC Cobras you've checked out.
I'm a little biased, but save a slant. :burnout: