Can I use a 2002 Emmick Kart w/ Briggs 206?

Locally they are selling a 2002 Emmick kart w/ 80 motor. It is complete. Can I run a Briggs 206 on this cart? Change gearing, etc? Guy wants $1000.00 for this complete kart. Will not go lower. Worth the "hassle"?
 
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