This is what came back:
Quote:
Hello Patrick
the part no. GP8-2015 is the coilover unit shortened for the E30, this must have
the bearing top mount to support the vehicle weight, springs are £16 each and
available in 250-275-300lbs rate (all prices are plus VAT and carriage)
Kind regards
David Lyon
P.S these will allow a -70mm ride height.
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I think I might go this way as it allows easier swapping of springs (and cheaper!! ) If the rates are wrong. Its only the higher initial costs of buying the coil overs. I would hope a -70mm over stock right height adjustment aught to be enough!