I need to know the lenght and width at threads of the bolt holding the rear upper spring mount (See part #9 in picture.) Will work the weekend with an idea to lift the car rear. Will post solution if it works. :)

I need this info in order to buy longer bolts than stock.

Thanks.
As this is a metric bolt please state size in mm or cm.
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The idea follows.

1. Make a 1/2 steel spacer 4" diameter with a 1/2" hole in the center.
2. Put that spacer over the Rear Upper Spring Mount.
3. You will need a longer bolt to tighten the mount.

A friend told me it works... it will lift the rear one inch. (go figure the mathematics). You get to keep the stock springs.

I will tell you later if it does...
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1987 - 240 DL 76k mi