You can't seriously be considering using a theroquad carb! That carb was made to comply with emission standards introduced in the 1970s. It was designed to run at over 200 deg f at its center body and have the fuel bowl part much cooler so the gas would't boil. In order to run this carb it will have to be modified by someone that knows what their doing. Why? Get an Edelbrock 650 spread bore, you'll be much happier.
And by the way, rule of thumb, never put a used cam from another engine in anything. They will usualy self destruct in a short time. New lifters won't help. Used cams have only scrap value, even if they look perfict.