Allright, so finds himself a used 7m with about 80,000 to 120,000k on odometer. With that mileage the motor is almost guaranteed to be on it's second or third HG. So you might as well tear it down and put a fourth one in it. Then upon further inspection he finds heavy block errosion just like every other high mileage 7m has. Now this "do it yourselfer" motor swap has just turned into a complete engine overhaul. After a decked head and block surface, new pistons and bearings, studs and MHG, you can honestly say that the engine could be a reliable motor swap that will last 150k or so.
But instead of an engine swap costing $700 to $1100 it will end up being $2200 to $2600 for a bone stock engine that is good for 235 bhp.

I'm only pointing this out because I have personally been burned by this engine time and time again with continuous problems. This engine is plagued with inherent flaws that can't be remedied.