hi guys iam in the process of converting my p100 to cossie power iam haveing a bit of a prob trying to fit cossie rear beam onto it has anyone done this and have any pics of the fab work for mounting springs and shockers ect thanks

 

why are you changing it?

 

+ 1?

 

when i got pick up the spring hangers were ut of and axle not there

 

P100 had a live axle, Sierra's have a diff and trailing arms.
You would have to fabricate new mountings to fit the beam, I would look at fabricating a cage to hold the diff and wishbones, have a look at the Cris Gibbs book "How to build a sports car on a budget" it has all the dimensions for the diff, wishbones and hub carriers.
It looks a lot of work but will be less bulky than trying to retro fit the diff carrier and weighs a load less.
Other option would be to upgrade the internals of a P100 axle add trailing links and panhard rod (or Watts linkage) like the escort rally boys do. Most bits available from Rally Design.