I think it's very likely that the fastest method would be simply to copy all the necessary table files to an SQL node then convert the tables to NDB after you've imported them.
This would be much easier
to do with MyISAM than with InnoDB, so convert the tables (or copies of them) to MyISAM first.
Stop the target SQL node if it's already running, copy the .frm, .MYI, and .MYD files over to it, then start it again.
In the mysql client, perform
ALTER TABLE $tablename ENGINE=NDB on each imported table to convert it to NDB (should be easy to script this part if there are very many tables).
Note that when backing up and restoring NDB tables, you can use
MySQL Cluster's native online backup and restore functionality, which is usually much faster and freer of hassles than using mysqldump.
Jon Stephens
MySQL Documentation Team @ Oracle
MySQL Dev Zone
MySQL Server Documentation
Oracle