A few A7Vs support 133MHz FSB - look for "686B" on the bridge chip if it is a rev 1.05 board.
The Thunderbird 1.4GHz for 133MHz FSB has a 10.5 multiplier by default. This means it's going to run at 1050MHz by default on 100MHz FSB. If I remember correctly, the multiplier block on the A7V goes up to 12.5x - this means you can set it up to that multiplier if you unlock the chip (if it isn't already), which is a fairly easy procedure as you only need to connect the L1 bridges with a pencil.
From memory, the 1.4 should interpret a 5x multiplier as 14x too! See here:http://www.a7vtroubleshooting.com/info/cpu/index.htm
In addition, the FSB can usually be overclocked safely to 105MHz, so long as you don't use RAID.