bhr ignition problems

I have had my 8 for awhile now an I haven't had any real problems with it I got my bhr ignition kit this week an installed it today and started it up an it started harder than it did before. While I was installing it the only thing that comes to mind is that the trailing 2 sparkplug wasn't in as far as the trailing one but it was hard to get it in there any farther. Taking it off it was really tight as well im just wondering if this could be the problem it's in there a good ways just not as far as the first one. I also have before an after start ups if I knew how to post them. Any help is appreciated