Tools & Fabrication - Underdrive pulley install tool

I just made this tool to install my underdrive pulley. Haven't used it yet. Will it hold it's a grade 8.8 m16x2.0 n 6.5 inches long. Just worried that its a grade 8.8 n mite not hold.

http://i303.photobucket.com/albums/nn145/wichoms4/0ef4cb95.jpg

A grade 8.8 bolt will definately hold. You could hang your car from that bolt if you wanted to.