Here is a thread, i posted what i did. It's a 2006 chevy truck unit, there are pretty cheap (about $110 +core new) then just drilled holes in the bracket and it went right in the factory mounts. To make the rod long enough, i cut the original vaccum booster rod (believe a manual brake rod will work also) to the length i thought it would need, then just welded it all together. The only thing i had to do on the body was open up the whole for the booster, but it was a minimal amount.
http://67-72chevytrucks.com/vboard/s....php?p=7378106