Didn't have enough clearance between the top of the carb and the cowling wall for a true velocity stack. Decided to make a "hat" out of foam air filter material from Briggs & Stratton. Made this a three sided hat, with the open face toward the prop. This foam hat captures the bits of fuel that spit back from the carb, yet still gives me good air intake flow.

This has solved the problem of getting raw fuel sprayed down the side of the fuselage.

Thanks for the idea. Didn't use the idea exactly as you stated, but it was enough to get me think of alternatives.