I have an 89 lx 5.0. I have a BBK cold air intake, accel ignition, plug wires ect. I have a set of shortie headers x pipe off road no cats 40 series flow masters with 2.5 inch pipe. The timing is bumped up. I am putting in a E303 cam .I want to get a upper /lower intake to compliment the cam. I don't have money for heads at the moment . I will add them later. I want a good upper and lowe combo.Would it be better to get a Edelbrock rpm air gap and an upper intake to go on it or would you get a combo kit? Is the SSI series intake from BBK any good . What is my best option but not over 650. Also do I have to go with a 70mm throttle body. If so what do I need to get.