How much is to much?

Not sure what the question is? I would look for an 8.25 out of an A body complete with brakes. Should swap right in if you get the spring/shock pads and u bolts with it. I would think you would be looking at $200 or $300 dollars for the complete rear end with brakes. Hopefully u bolts and spring/shock mounts included because you will need them.

you may have to change your wheels over to big bolt pattern not sure if all the 8.25 are BBP of if they made some SBP.