[Brentco]

I’m generally a fan of annular boosters — it’s too bad they’re not offered on more carbs. So a booster swap sounds like a cool project.

Based on the factory spec sheets I’ve seen, the difference with the annular booster versions seems to usually be confined to the jetting (a bit smaller prim and sec). But that’s just how they set them up from the factory — it isn’t necessarily the optimal tune versus downleg versions.

My WAG would be that the chief difference would be the main jets, but if you’re really persnickety about the tune you could end up with small tweaks to other circuits as well.

But if you’re hunting for something to dork around with, all the better!