rebuild

About a year ago my jeep liberty died, today it is alive and well. I towed it to my parents house and worked for a few seasons and bought parts to fix it. My dad is an engineer and helped me. We did an engine rebuild and it ran for a bit then it wouldn’t start. After that we replaced the fuels...

I need more power! 3.7L with 210K miles, but we live and drive at high altitude. Pulling my little boat over the Utah mountains isn't working. How can I get another 50 or 75 ponies? If this were a V-8 I'd rebuild it and get some better heads, a little bit of cam and make it flow. But, who...