Installing HEI ignition in my 49. Was recommended to get 8mm wires for new system. I received 2 sets of boots each set has 10 boots in it. Wires already have boots that go to the plugs, I will have to make up the ends that go to the distributor. My question is one set of boots came with brass looking ends and the other set comes with silver looking ends. I tried placing one of each on the distributor and the silver looking ones fit a lot tighter than the brass ones, is there supposed to be a difference in the two? I would think that the brass ones would carry better current but not sure. Also the boots that came with the silver ends have numbers on then like 0022,0006 etc. Maybe be making way too much of this but kind of confusing to me. Sure would appreciate some help on this one. Thanks guys.