Your welcome gotta help where we can. I would be a little warry on keeping your current cam as I have seen the lobs start to wear at high mileage(bangbangskeetskeet's truck) So personally I go with the cam if I have to choose. I think there is no perfect rule of thumb on upping the compression ration. I think a cam will be more cost effective as head work gets expensive fast. I believe oleshifty or ssmidwest has a set of work heads for sale for $600. You will need a tune for it to run right with the cam and Nelson will send you a mail order tune just for your setup that should work just fine that you can install at the same time as the cam and keep it on the road. He also does free retunes if you make more changes down the road. Also one of the basic Circle D stalls will allow you to still tow no problem.