Advice on rear springs and ride height, 100 pound springs...level. higher? Options

[computers4kids]

The 75 914 that I'm working on had a sagging rear end before I pulled the engine and started restoring the car.

My goal is to restore it to stock height. Currently, it has stock boge (sp) shocks and linear springs with green markings...should be stock from what I have read...65 lbs?

I also have a set of KYB adjustable gas shocks and linears springs with green on them that came with a parts lot I picked-up last year that appear to be in good shape, but who knows.

Since springs control the height, I presume the stock springs that came off the 75 are shot.

If I purchase a set of springs, it seems I see a lot of "100" pound springs being sold as the ticket for stock. But...I have also read this will raise the rear higher than stock, which is what I don't want...I want level. I am not an ax-er.

What spring should I use? Where is a good source? I want to choose the correct application and be done with it. The tub is still bare (no engine or exhaust) so can't just experiment.
Thanks,
Mark