A turbo might be cheap to start with but all the extra pluming and header work will be a challange for someone with little or no fabrication skills. An option would be a centrilgul blower. If you have the extra room in front of the motor it should be pretty easy. A blow though carb setup from a v8 would almost go right on all you need is a few bracket's and the carb you were going have to buy anyways. This seems to be the best upgrade because most inliners have a aftermarket intake and headers allready.
www.procharger.com

Steven