K kapejo Active member Joined Jan 3, 2004 Messages 25 Location Jacksonville, Florida Nov 11, 2014 #1 Approximately how many rpms will my stock 390 will be turning at 60 mph. 1966 Tbird with 215/75R15 tires. Thanks, John
Approximately how many rpms will my stock 390 will be turning at 60 mph. 1966 Tbird with 215/75R15 tires. Thanks, John
B boaterbob Well-known member Joined Dec 22, 2002 Messages 431 Location NJ Nov 11, 2014 #2 With the 3.00 rear should be about 2,200. Should be calculators you can google also
