John, you are correct when speaking of Mopar muscle cars. I should not have said "most models" because someone (like me) will always find an exception! However, not all B motors had the plug wires routed beneath the manifolds as you can see from the 413 4bbl pic below. The # 5&7 wires were run along the valve covers and over the manifolds. Those wires must have burned up real quick! Remember, when it comes to Mopars, there are always exceptions!