yes they were a matched pair when acquired,and she can pull the girder trailer as well if required but will probably just be used for carrying the m74 when thats done as its a nice small load,as its not as easy to manouver as the contractor which is lower geared.its first job will be to go and pick johns antar up to bring back for restoration for use with the dyson 50 ton trailer.amazon will have just one whoopee light on top of wide load box and trailer has 2 on back end,as they allways go out with escourt vehicle to be safe