Jon,
My Dodge has the 230, and I'm adding a a833 OD this winter.
Is there a web source for info on the 1904 and similar Holleys?
I have found one that is supposed to be the complete list of 'list' numbers but many of the carbs I find are not on that list.
There are some that look like the 1904 but have external 'normal' power valves as well as the one under the top cover
