Just check it and make sure that it has no major problems, and do regular maintenance to it. If it hasn't had the headgasket changed to the MLS one, it will need it, but it's probably not likely that it hasn't had it done. As for the SOHC, some people swear by it, I personally swing two sticks, and wouldn't own a SOHC except for daily driving. But the SOHC has more torque, just not as much of a top end as the DOHC.