hey all just wondering how much hp can a standard 1200 box take, stripping and buying parts so gettin it ready to install thanks for any feed back...

If you mean that you have a 1200 gear box.
We have a 1916 with 59hp @ wheels bolted to our 50year old gearbox

http://www.youtube.com/watch?v=YYbWXfkRrX8&feature=channel