Is this really a Briggs racing motor?

#1
I just picked up a Rupp Hustler with the wrong motor. The one that is on it is a Briggs and Stratton 5hp. There are stickers indicating that it's a race motor. We're these stickers added or is it? Thanks in advance. 20160424_161846.jpg 20160424_161852.jpg 20160424_161856.jpg
 
#4
That looks like a raptor to me. If it is flush and it looks like a hole was never drilled for the governor shaft to go through this then it's a factory raptor block. Nice score :thumbsup:
 
#5
Looks to be a "race engine" as the governor hole looks to be closed off from the factory. Plus that warning sticker seems pretty genuine!
 
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