How narrow do you like your cab?

I set up this blog before I departed for holiday  well I know you'd be missing Biglorryblog). This ad is from the fantastic ttp://www.adclassix.com/ website where there are superb old car, truck etc ads for  sale and where you'll find some great images of US trucks and pickups from days gone by. Well worth a visit and I trust they won't mind me showing you this one from 1961 which features an IH cabover with a 54" bumper-to-back-of-cab measurement  I'll say that again just 54 INCHES!  The ad was in conjunction with the American Trucking Association (ATA--the US equivalent of the RHA/FTA) and talked about trucking efficiency provided by a cabover like this....