Tailwind Financial Inc SPAC has filed the preliminary proxy for its acquisition of Allen-Vanguard, stating that shareholders will now vote on the $338 million on April 16, 2009.

Allen-Vanguard is a provider of solutions for protection and counter-measures against hazardous devices and materials, including improvised explosive devices (IEDs).

Tailwind raised $100 million in its April 2007 IPO.

Read the preliminary proxy here