Eibach advises their Sportline springs are for 79-04 Mustangs "exc. convertible". The only difference I can think of is the spring rate for the added rear end weight in the vert. I wouldn't think it would be significant but was wondering if anyone else had tried before I bother. I'm pretty sure I'll be dissappointed w/ the Pro Kit drop because everyone complains about barely being able to tell it's lowered. Thoughts/experiences appreciated.