well the OD of my carb is 2" so i went to the hardware store and got some 2" OD PVC pipe and a 2" rubber sewer coupling...
I took my carb boot and cut it back so that the PVC pipe fits snugly into it clamped it down with a hose clamp...
you will need to try to install it, bend the PVC pipe a little then try again until it is bent to the same angle as the carb and then you need to take the coupling slide it onto the PVC pipe and then slide it over the carb and tighten it down with 2 hose clamps
http://i259.photobucket.com/albums/hh313/tjsdaname27/100_1098.jpg
http://i259.photobucket.com/albums/hh313/tjsdaname27/100_1096.jpg
those are the best pics i can get... and I hope i explained it good enough for you to understand..
if you want me to explain it better then just ask...