Best vender for 72 Dart carpet???

I had decent luck with StockInteriors on a previous install. If I did it again, I'd get the upgraded 'mass backing' option as their 'base' model is lighter than stock (although easier to install). They'll send you free samples, too, so that you can try to match up color.

Previous comments on installation were pretty spot-on. A warm day helps, as would a hair dryer/heat gun. You may have a wrinkle or two, but if you go back after a week or two then you can usually work them out easier at that time.