The following pictures are of the Harrison (HRP) class A Alky block. This particular block was designed to be mounted on a British Anzani class A-B crankcase and tower housing. It was only in these most recent times on this website that I came to learn that Harrison engines though I seen them in the 1960s amongst Anzanis was truly the Britsh engine's American cousin! Both engines shared the crescent shaped exhausts systems leading most onlookers to think the design was so good that 2 different brands of engines adopted similar design technologies or they were the same engine as Anzani that was mistaken and described as a Harrison. Harrison in fact was making aftermarket parts for British Anzani engines in America for quite some time and the name Harrison in the UK was associated with Anzani as Anzani was associated to Harrison in the USA. Kind of confusing but the facts were these engines were awful fast in their time and set records proving that.
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