carburator help

For a Holley, on a street strip ride, fair weather only, I'd look at this myself since it is a 4spd manual your driving;

http://holley.com/0-82851

An electric choke 850 like the below, IMO, would be a little nicer than the above listed one due to the electric choke. There is no performance gain with a manual choke. The electric choke just makes cool/cold weather driving/warm up's easier.

http://holley.com/0-80531