Get a 3rd Gen Camaro. 1982-1992. They are Cheap and slowly dissapearing. Get one with a v8 get a flowmaster Exhaust with some K & N Air filters get some good wires and plugs with some royal purple oil in it and you will do fine. A stock 350 TPI Iroc-Z has around 300 Horse and with the weight of the car it will be around 7-8 Secs. But doing that stuff you could get it in the 6 sec range.