i have an 89 mustang gt with 86k origional miles, t5 trans with dual centerforce clutch, aluminunm driveshaft, 3:73 rebuilt posi rear, bbk shorty headers, offroad h pipe with no cats into flowmasters, e303 cam and 24# injectors... i would like to throw a set of heads, maybe upgrade to the f303 cam, upgrade to longtube headers, a nice intake, throttle body, and cold air intake... what would be my best options for around $3500 in parts....