Any ke70 owner ???

So I finally got fed up with my engine. NOT because it has no power, like seriously it was fun having to drive around town and not worrying about fuel in this little engine. But its been costing me unnecessary expenses. So I've made up my mind to disregard the small cc and op for something worthwhile. I plan to go with a 4g91, but then I heard people saying 1.3 chassis can go for 1.6 engine. That being the case, if lady luck is at my side, might as well go on a treasure hunt for a 4G92...