[Hotfingrs]

You can buy a cam assortment kit. But first, is your engine stumbling or hesitating?? This will dictate what you need to do. If it takes off then dies, then takes off again under acceleration, you're not getting enough of a shot of gas...put a larger squirter in. If it dies as soon as you nail it, then takes off, too much gas, smaller squirter. Play with squirter size first. Holley rates their accelerator pumps by the amount of gas they will squirt with 10 pushes of the pump. Most don't really need a 50cc pump. You really didn't say if you were having a problem in this area, only observations on differences....