Hoping someone might have some insight into the differences between the 21J carb versus the 21(J).

The 21J was standard on the Spec II engine while the 21J(B) carb was standard on the B2101.

I'm considering placing the 21J carb onto a B2102 as I have heard the tuning performance is much better. than the stock 22C carb.

I have noticed there are more recent versions of the 21J carb as well (i.e 21J2 and 21J3, included on the new Drake Motor). Not sure if these would be better alternatives?

Any insight would be appreciated! Thx!