Yeah, I never said 100 MPG, I guess I meant stock. I have mounted the engine with the Fit A/T (bigger)and it fits and even uses the factory trans mount...As far as 5 speed (much smaller that A/T) goes I have at my house an 08Fit, 09Fit, 04HCH, and 02Insight gearboxes and all of the outer cases are all the same. Yes you will need some skills, I assume most here can do more than change a tire but if I had the time and a jig for the mounts, it could be done in a weekend. A/c compressor is the same port wise as K20. Lean burn is a function of wideband O2 sensor and the ECU, gut the cat and run high NOX and you can do much better with a K as well.
BTW wasn't this a dreaming post?
This car should be looked at as the ultimate high MPG car but as a reliable, easy and cheap car to fix and drive and compared to the original, a whole lot more fun......
*****
I just discussed with my wife about salvaging my project to do this exact thing in my other insight since its still untouched, she said I must, I hate you Ecky