My Boatsport.org website will give you a good idea of outboard racing in the 1950's.
The success of racing in the 1950's was a combination a strong economy, the easy availability of race motors, race sites and indirect factory support from Mercury outboards.
Outboards were raced many years prior to the 1950's and a book that gives you a good idea of the very early days can be purchased for just a few bucks. Check out
http://www.alibris.com/booksearch?ke...s.x=15&hs.y=11
They have one posted for $1.63 plus shipping.
Good Luck with your project
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