No, the Stromberg 2V is different too.
There are two kinds of 2jet,
a)an early one with two bolts,
b)and a later (2CG) with four bolts.
c) The later Rochester has the same throttle blade spacing and bore diamters as the #2300 Holley 2-bbl.
d) The 2-bbl Holden Stromberg 2V I had was different to each of these kinds of Rochester, which I got off 283 and 327 Chevy engines of different years.
I am not exactly certain what the bolt spacing is to the nearest 16 th, but I keep records of EVERY THING, and can find out!