Best Cam for a 340

Has anyone run this cam XE268 or the XE284. Was wondering if the 284 was too much for the street. Will be running LD340 intake, TTi headers, 3.55 gears with a 727 tranny in a 69 dart with a 69 stock 340( unless I change the pistons). Carb is a holley 670 Avenger, Not sure on tires yet. Any thoughts guys.