Yup it's possible but it may involve some work.
I put an Tbred B XP1700+ mod'd to XP2400+ in a Abit KT7 (not KT7A) and it ran at 20 * 100 = 2000 Mhz (~XP2400+).
It should be do-able with an A7V which has the same chipset as my KT7 but I'd try a XP2400+ or even an XP2100+. Good chance of it working without mods. Just make sure you use a Tbred B.
Here are some resources for running Tbreds in old mobos.
<A HREF="http://mysite.verizon.net/res0exft/" target="_new">Wes Newell's Homepage</A>
<A HREF="http://www.beachlink.com/candjac/TbredDecode0.htm" target="_new">John Carcich's Tbred multiplier decoding (includes the remap tables)</A>
<A HREF="http://www.beachlink.com/candjac" target="_new">John Carcich's homepage (has everything you wanted to know about overclocking Athlons)</A>
Also try these newsgroups.
alt.comp.periphs.mainboard.asus
alt.comp.hardware.overclocking.amd
If you don't have a newsreader (I don't) you can access the newsgroups through Google Groups,
http://google.groups.com (sorry, hot link doesnt work).
I don't know if these will work if you aren't registered.
<A HREF="http://groups.google.com/groups?hl=en&lr=&safe=off&group=alt.comp.periphs.mainboard.asus" target="_new">Asus newsgroup</A>
<A HREF="http://groups.google.com/groups?hl=en&lr=&ie=ISO-8859-1&safe=off&q=alt.comp.hardware.overclocking.amd" target="_new">AMD Overclocking newsgroup</A>
<b>[EDIT]</b>
p.s. The fastest you can go depends on some luck but the highest remapped multiplier discovered is 24x. At 24 * 100 you'd be running at 2400 Mhz (~XP3000+).
100 and even 133 Mhz SDRAM memory will really limit performance but it's still possible to run this high speed.
<b>56K, slow and steady does not win the race on internet!</b><P ID="edit"><FONT SIZE=-1><EM>Edited by phsstpok on 07/02/03 10:36 PM.</EM></FONT></P>