I've had my 99 EX for 3 months. i bought it off of a private seller which looked to me that they took care of it. Well i guess the didn't change the oil like they should have. So on my way home the bearing goes on a piston rod. I am looking for a new motor and have been told to do an engine swap. Im a newbie at this but always wanted to get into Autocross with some friends. What Motor should i put in it?