This custom-made, one of a kind vehicle was built exclusively for the purpose of towing this Aerocar trailer. The tow rig is a 1938 INTERNATIONAL D15 customized in Brantford, Ontario by Brantford Coach... the cab and chassis with a shortened wheelbase also is only a 6 cylinder 93 horsepower motivator, with a 4 spd trans and a 2 speed rear. http://www.hindleysgarage.com/38intl.htm
Straight from owners themselves!
Their website: http://www.hindleysgarage.com/