That was the way father worked with loader too.
Kind of cumberson on tractor so it came off until manure handling came along and it was not a quick attachment but still speeded up manure handling 

I actually used that tractor and loader for first few years I started farming but I bought a Nuffield after my first year or so and the B sat mostly after that with loader on most of time.

I did buy a 434 IH with an IH loader soon and loader got scrapped and B sold at my uncles sale not running well with a cracked fly wheel