as long as your car passes a roadworthy and has been complied before (with a plate), you shoudl not encounter too many issues. if you car is not lower than 100mm at it's lowest point, forget about changing springs. computer! - can't see any issues with that! go to Nissan and get a spring for the handbrake, if they don't have one, try one of the auto shops. it may be worth putting your car through 'as is' and taking the advice they give you - then getting things fixed. reinspection only costs $11.00..... if you have any further Q's, or need help PM me