I recently bought an 02 overland. (4.7 HO) I love it. I have previously owned a 76 and a 77 cherokee. (loved them too).. My question is how can I get my Horsepower up to around 300? I know I can add intake, and exhaust, but that would only add about 25 putting me around 290... What can I do for the rest? Any ideas?