Did any 66 Imperials have dual Master Cylinders? As I remember, lesser Chrysler products made a running change in the '66 model year. I guess I am worried that replacing the single M/C with a dual one would hurt it in judging, since it was not Original Equipment. -----Original Message----- From: imperialdrivein@xxxxxxxxx [mailto:imperialdrivein@xxxxxxxxx] Sent: Wednesday, April 02, 2003 10:57 PM To: mailing-list@xxxxxxxxxxxxxxxx Subject: IML: 66 master cyl. I installed a Napa # 36221 (late 60's full size mopar w/all drums) M/C with excel. results.It bolts up to the booster w/no problem. You will need fittings available new and a junction block from a late 60's mopar w/all drums.I got my block from a junkyard.I replaced everything (hoses, lines, whl.cyls and shoes over two years ago w/ no problems since.The Auto pilot bracket may need work or removal for the m/c lines . Good luck it's worth it! Imperially ,Gary 66 Cpe.