There are a few of us on here that have swapped to a Bravo. Just drop in, No, not that lucky. Those of us that have swapped it in have all gone a slightly different route. I used the full bravo engine & carb with the original G1 clutch. The crankshaft is longer on the Bravo so the engine needed to move over to the fan side a bit. Plus the engine needed to be lifted and tilted forwards to get carb clearance as well.
My ongoing build here,
http://www.buggiesgonewild.com/gas-y...1-project.html