Things were going well for IHC in the light to medium market but when it came to the heavies they were being outsold, not helped by using outdated tractor engines in the trucks!
What they did was come to an agreement to use Hall-Scott engines and distribute ACF buses from their 150-plus branches across the USA. The model numbers were changed to indicate the much more powerful state-of-the-art Hall-Scott four-cylinder overhead camshaft, OHV 5.2 litre gas engine and larger units. The Hall-Scott featured an integral oil filter, something that Ford didn’t use until after WW2! The Hall-Scott gas engined trucks were numbered HS-54 to HS-104, but hardly any of the heavyweights came
