Fastest/ most powerful slant six?

Cox Bros Dart
http://www.slantsix.org/galleries/claycity/2002/cox-team-pits.jpg
http://www.slantsix.org/galleries/claycity/2002/cox-wheeliebar.jpg
http://www.slantsix.org/galleries/claycity/2003/cox-burnout.jpg

Drakes Simca
http://www.slantsix.org/galleries/bristol/2002/DRoseLDrake-burn.jpg
http://www.slantsix.org/galleries/claycity/2002/drake-burn.jpg

Dale Rose Arrow
http://www.slantsix.org/galleries/claycity/2003/winner-dale-rose.jpg
http://www.slantsix.org/galleries/bristol/2002/DRose.jpg

Charles Myers Arrow
http://www.slantsix.org/galleries/bristol/2002/CMyers-burn.jpg

Both Arrows
http://www.slantsix.org/galleries/bristol/2003/arrows.jpg