COULD ANYONE EXPLAIN THE DIFFERENCE IN AC SUSPENSIONS?? *1995-2002 * STARTING WITH 95-96 ZRT. *HOW MANY INCHES WAS ON THESE YEAR AND WHAT FOLLOWED 97 AND BEYOUND?? *WHAT IS THE 12", EXTRA 12, 13.5 AND WHICH USES ETT. DOES ANYONE KNOW HOW THE M-10 COMPARES WITH EXTRA 12 OR 13.5 ECT. THANKS FOR YOUR HELP. *RICK