Which car insurance company is cheap and good?

"i'm currently 17 (18 april 8th) and i've been operating legally since last september (got permit october. 2007). on my history it claims i'm driving my mother's 98 chevy venture (minivan). My dad and i are getting a v8 mustang from around '86 to '93 and therefore are repairing up it for me to generate. My fatheris worried the motor is quite potent therefore  insurance   charges may increase (which he obviously doesn't wish to pay along with the dreadful mpg this car has). Will my  insurance  charges reduceExplain which will be more straightforward to spend money on mutual or  insurance  funds?
"I use it to pay the residual amount of cash easily get dental insurance may