I recently renewed my insurance and got good deal from swinton, they have a specialist division for modified cars.I was getting quotes of 1k from adrain flux and direct line but ended up getting it insured for just over 600 with the modifications declared, 6 years ncb, worth a try.
swinton specialist division.tel 0845 1684422.
swinton specialist division.tel 0845 1684422.