Advantages of getting rid of the mono spring C4 suspension

[abadsvt]

Hi guys. I have a 65 chevelle with c4 corvette suspension front and back. I bought the car like this and it drives great. He used all stock c4 suspension parts including the monosprings. I was curious if you think switching to coilovers would give any noticeable handling improvements? Wouldn't mind lowering the car a little which could be an advantage to coilovers but don't want to spend all that money for little change. I would like to get into autocross for fun and was putting together some modifications i would like to do to the car. Thanks!!

Josh