Rear springs

Thank-you. This will not be the first time that my thoughts were incorrect.

Two questions: For the springs, how do I ask for them to be bent back to stock. Is there a measurement I can give the spring guy ?

As for shocks, do I use a standard shock like on the front or upgrade to a non adjustible sealed air shock ....$ 400.00/set is a bit too rich for me.

Thanks
Grassy