Kenny, I dont know what he means by quality metals......
they do have the same cast iron block along with other goodies I'm not familiar with. I do know they have hollow cam and cam shafts.

Non of the JDm 7 bolts ever had the crank walk problem like we had with the US 7 bolt. Mistu makes a great engine then gives it to the americans to screw up. I have hear stuff about how the americans deceided to harden the crank but in relaility they ended up softening it.

The evo is just a backwards 4g63 7bolt.