Re: sprocket recommendations for big guy?
You might wanna just stick with the stock sprocket which is a 44t. if your looking for more low end power/torque get a higher tooth sprocket or if you want more high end power get a lower tooth sprocket, the lower the teeth the more torque and get up n go power you will loose.
PirateCycles carries Jims(manicmechanic) sprocket adapter.
Good luck and post some pics of your build