I had Hooker 5115 Super Comps on my 71 Challenger with a 340. They fit good, had good ground clearance, went behind the steering, but they leaked like hell at the header flanges. I used the best gaskets available....didn't help. The tubes on the 5115's are also too big for a stock motor. If I had it to do over...it would have been Dougs D453's instead.