carb for mini blower

You can boost reference any holley.
Here is a link.
I am using a 750 vac secondary on my brand x build.
Start with the timing around 16 initial and 28 max would be a good starting point.
Make damn sure you don't lean the motor out, buy a good wide band meter, and a good fuel pump.

http://www.motorsportsvillage.com/modifycarb.html