Could someone tell me why my engine dies when I put it in gear? I have a 65 Plymouth fury lll with a torque flight 727 the motor and trans. Are a 68 383 4 bl. Both are rebuilt and work fine the problem is even with the idle set up on it when I go from park to reverse it’s like letting the clutch out with the brake on ? If I keep it revved up enough and put it in gear I can go ok. Any advice is appreciated.