i've been wondering about lowering the suspension on my 1997 1.9d Berlingo van for a while now, what i'd like to know is what lowering springs would be suitable to use - i'm guessing those from a 306 would work? but what spec 306 springs fit? i've also been told that if i want to lower more than -40mm (ideally i would like -60 springs) that i need to source & fit 'lowered shocks' for both front & rear... Any ideas where i'd source and what, if anything would they be shared with in the PSA range? any pointers, ideas, offers of suitable equipment welcome!
the van is totally standard at present, including the steel wheels, it will be staying that way too, save for the suspension! i'm no chav!

cheers, Neil