IN A HEAVY SAUCE, PLACE CARMELS AND EVAPORATED MILK OVER MEDIUM LOW HEAT, STIR UNTIL SMOOTH. STIR IN 1/2 CUP CHOPPED PECANS.
POUR INTO PIE CRUST AND SET ASIDE.
COMBINE CREAM CHEESE, SOUR CREAM AND MILK IN A BLENDER. PROCESS UNTIL SMOOTH. ADD PUDDING MIX AND PROCESS ABOUT 30 SECONDS LONGER. POUR PUDDING MIXTURE OVER CARMEL LAYER SPREADING OUT EVENLY.
CHILL, LOOSELY COVERED UNTIL SET. DRIZZLE FUDGE TOPPING OVER PUDDING LAYER. SPRINKLE TOP WITH REMAINING PECANS. CHILL UNTIL READY TO SERVE.