For sure I would consider other 1bbls.
The Carter YF has a good reputation (and was used on some of the 153/90hp Chevy II cars)
The Holley 1920 and 1904 (glass bowl) are popular, tho I dont like the glass bowl as it will not make it thru dragstrip tech.
(you are going to race your straight six of course???!?!?)

I just acquired a Holley 1940 I plan to try and compare against the BV carbs. Not sure of its reputation overall but I will find out.