I am looking to get new shocks on the Red Fox and was wondering what would be the best. The current shocks are KYB but I am looking at replacing them with Bilstein. I am also unsure as to the difference in the Heavey Duty shocks or the comfort, I am guessing it is the stiffness but would like some input on which would give the smoothest ride.

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1980 300D European
"The Red Fox"
200,000 miles

2003 Chevrolet Silverado

609 Certification