I bought everthing to setup dual carbs on my 235 from Langdon's but the carbs (holley/weber progressive type) have those big ugly water operated chokes. I went to Napa to buy a couple of manual choke conversion kits but the two kinds they had didn't fit right. The cap/cover diameter is either too big or too small. Anyone out there do this conversion in the past and can share their experiences?

I wouldn't mind going electric choke either but I don't know where to start there. Parts places around me haven't been much help with the carbs without a part number or make/model/year type info.