Can't say for certain, but most every carb I ever rebuild, and I rebuild a ton of them, the floats were always adjusted to the level of the fuel bowl plate. In other words when you take the carb upside down, the float was level with the carb top section. And it is a great idea to replace those old floats. I mean it is a 1986 carb after all. JMHO
Thanks for the info. Also, do you know if it will be necessary to reset the max advance after switching out the trigger?