Good day everyone , hope y’all staying safe .

As a senior citizen and new to the new edge Mustang group , was hoping you younger fellas can shed some light on my question . I have a 2002 GT . Usual mods . Tried to put the white face gauge decals on . Being in Canada I ordered the KPH set and big surprise most fit good but the RPM . Past 3000 they get progressively off . Looks like crap with lights on .
My tach goes up to 7000 , I have seen some GT tachs 8000 . I want to replace the cluster back to original . Can I use a 6 cylinder cluster frontman the wreckers or do I need another GT cluster . Thank you guys and gals for any help