Looks like your right bar is a left. The right bar should be an even number. Bars can be installed either end front/back, but there is a right and a left. The three digits are the last three numbers of the part number, Cannot locate a bar ending in 317 or 217. However, the standard bars should be 510 (R) and 511 (L) while the heavy-duty bars should be 516 (R) and 517 (L) A bar stamped 522 will not fit an Imperial - it is for a Dodge Polara or Monaco. Bill Vancouver, BC ----- Original Message ----- From: BOBSMOPAR To: mailing-list@xxxxxxxxxxxxxxxx Sent: Tuesday, March 02, 2004 7:17 PM Subject: IML: 68 t-bars Hi All. Tonight I pulled the isolator bar out of the Imperial. I then tried to turn the bars a little to mate them to the adjusting bolts but they would not move do I need to loosen the nuts that hold the lower a arms on the cross member. I also checked the numbers on the bars. On the right one it has stamped on it 317. On the left one it has a L and 217 on it. I have one nos bar for the right side it is stamped 522 R can I use 1new bar and 1 old bar on this car. Thanks for any help you can give. I thank all that replied so far. This list has been a great source for info and parts. Bob 68 Imperial