Spark plug wire looms

Routing the spark plug wire has always been a problem for my marine engine. A commander 351. This year I ordered a loom set from Century performance on line. I originally planed to mount the wires vertically if I could. I ordered the vertical smoothie set for $26.95. Turns out their was not enough room between the valve cover and the exaust manifold to facilitate the seperator housing for a vertical mount. I did howerver mount the four wire seperator with the housing to the valve cover bolt closest to the distributer(vertical). Then used the other seperators w/ the mounts removed to seperate the rest of the wires. I routed these wires under to exaust manifolds to the plugs. It came out really clean and I was able to reduce the length of the wire by 6-8 inches each. Usng the vertical mounts secured to the valve covers provided stationary support. This in turn lifted the wires off the block as they round the front of the engine. Good luck.