CV carb will handle up to about 90 HPs. A CV44 is another option to provide smooth power and better fuel mileage. S&S is a good carb but tends to drop fuel mileage due to it's design to deliver a lot more fuel faster. More of a performance/racing carb. If you go that route, look at the Super-E Shorty.
“When the going gets weird, the weird turn professional....” ~ Hunter S. Thompson~
R.I.P. Rubberdown. 1971-2012