HY ALL OF YOU,<br /><br />COULD I USE FOR MY OLD 1990 MARINER 275HP 3.4L EITHER TCWII OR TCWIII? CAN I MIX?<br />IF THIS ENGINE RUNS GOOD WITH TCWII, WHY SOME PEOPLE TELL ME IT´S BETTER TCWIII. I´VE TESTED BOTH AND ENGINES RUNS SAME...SAME TEMPERATURE, SAME TOP SPEED, SAME ACCELERATION..<br />MY...