Are longboards faster than shortboards

Why would you want to turn a freebord into a longboard? Anyway, you can turn a freebord into a longboard by removing the baseplate, buy a new longboard baseplate and truck, however, if you find a baseplate with the correct specs for the sizes and rubbers it would be possible to use the freebord trucks. However the trucks are too long for a longboard, unless you like sliding, deep curves and Uncontrollable speed :)

Hope i helped :)