My truck has a 4 inch lift and has james duff suspension on it, by suspension i mean 4 shocks on the front and two on the rear.. I need to replace them and I was wondering if anyone could give me some advice on james duff parts? are they good or not? and if not what should i look into? Also can my double shocks on the front be replaces with one? I don't know much about shocks so all information is welcome.. (I would appreciate sources too?)

Thanks!

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1989 Custom 2.9l 6-cyl.
She's almost a complete rebuild, including a chopped bed, James duff suspension, rebuilt engine and lots of other unknown different parts
We call her the bride of Frankenstein!