well, i have a set of fresh 202 j heads,, butif i bolt them to this intake, will i lose any power due to the intake being port matched, and the heads not being matched?
Unless the X heads are port matched as well (to the intake), then no you won't be losing anything.
Some food for thought though would be if you're build the motor up look for an LD340 intake or a RPM intake (lighter and flow better then stock).