I got a chance to buy 1994 wreckd police caprice beside the frotn brakes can I use the rear alumunim brakes or the whole rear end because it has posi also is there any other parts I could use?

Those Posi rear ends are weak (auburn type)
side to side I believe they are too wide for a Chevelle

Grab the steering box off of it.

You'll need to do some easy "mods" to get the box to bolt into the 'velle, but I did it this weekend and its worth it graemlins/thumbsup.gif

Joe