I am getting ready to rebuild, I am going to get the Howell bottom end kit and I鈥檓 going to run a 150 shot of nitrous, after the rebuild. I looked at Howell鈥檚 top end kit and it doesn鈥檛 come with new valves, and I don鈥檛 want new cams, so this kit isn鈥檛 for me. Anyone know of any other top end kits? What all should I replace on the top end and what are the best valves and springs to run? Any other top end info will help Thanx Jesse