Review on MSD 5567 Street Fire Spark by Tim Duncan

The wires appear to be of good quality but the length measurements provided by MSD are far from perfect. Here is what I have, the first group of numbers are the indicated lengths of cylinders 1-8: 31", 39", 37", 28", 28", 29", 27", 29". Here are the lengths I got: 40.25", 38.25", 30.125", 32", 30.25", 30.25", 30", 28". Six wires are intended for installation under the manifold and two of them for installation over the valve cover. I wanted them behind the block and without the covers, but the 2 wires (for cylinders 4 and 6) are about 6 inches short. If these wires were 38 inches long everything would be fine. Not sure if the MSD will work with me or not when swapping two wires, I think I can try.