If the shocks aren't in the middle of the rear coil springs, you can install an air lift system. I put one on my former Toyota 4 Runner and it did a great job of boosting the load capacity a little.

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250