Best choke for downdraft carb?

[alexiskai]

I'm planning an upgrade to the Stromberg 97 carb on one of my cars. I'm trying to organize the parts list. The consensus seems to be that a choke is sometimes needed. Snyder's sells a cable choke, for which I would need to get a 97 with the cable choke bracket. But I wondered if the stock choke could be adapted, or if a third option is workable. I'd prefer not to punch more holes in the firewall if I don't have to.