Yes -
"B" is manual choke
"BC" is heat tube to bimetal coil on the carb
"BV" is bimetal on manifold, rod up to carb
Of all the B, BC, BV I've had ( a couple dozen?) I've never noticed a diff in the floats. I bet any swap meet carb ($10 or so) would have a usable float in it if you can't buy a new one
They are a great carb!
