Just replace the affected head gasket and take care of that simple repair rather than the chore of swapping the entire engine. As John mentions there isn't any difference in the 99 - 01 engines. The part numbers are the same for the block castings and the "modifications" are something of an urban legend.

But if you really want to go with the effort: Get a Direct Injection drivetrain and transplant into your VX. That'll knock your socks off!