Well i bought a briggs 5hp raptor block that came off a jr dragster , i was told it was a "13 M" casting , well........I was looking at a Normal briggs 5hp Edger engine and well they Look identical , WHat i want to know is there a difference besides the Cam and valves etc ........ and if i was to have a Regular briggs 5hp engine could i Put those aftermarket valves cams and high compression heads??
thanks

I don't see why not, people will build off the regular engines.

yes u can i did it be for