>I may be wrong, but shouldn't a '66 Imperial have 235/75R15 tires? 235/75R15 is the closest radial in diameter to stock bias ply tires. You can play around with other wheel sizes and go a few percentage points up or down from stock outside tire diameter, so a 70 will work. As I pointed out in my message with the link, you need a different speedometer pinion gear for different diameters. The other thing you should consider is adjusting the suspension for the change in ride height. -- David '91 K-Imperial driver (14-inch radials) '66 Crown Coupe project (gonna get 15-inch BFG bias ply) '66 Newport 383 4bbl .030 over Eddys/Hurst/Cragars dual exhaust daughter's first Mopar (drag slicks, hee hee hee) ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm