I was driving down the road, riding just fine then all of the sudden my oil pressure flat lined so I immediately shut off the car and coasted into someone's driveway. I checked the oil, made sure nothing was leaking then figured that maybe a fuse blew and just made it go out. So I started the car and it was knocking hard, so I shut it off. I think the motor might be done. Only 79k miles on it and it's gone because the oil pump more than likely went out. Can I swap it for something bigger? What engines will fit my TR-3650 5 speed manual with light or no modification and how much should this run if I get everything used?