Unsure which new Carb to pick

So, I'm wanting something a little bigger than a BBD on my 225 slant. I don't want to do anything too huge, though, since I don't plan on changing engine internals unless they break.

So, the main choices I see online seem to be a Weber 38/38 and 32/36, the 350cfm Holley 2300, and the 390cfm Holley 2300, and the 390cfm Holley 4160. I was wondering how these would all compare on an otherwise stock 225 slant, in both the work required for the conversion, and actual performance. The 4160 would require a 4v intake, I know, but for the other ones, a previous owner already put the Super Six 2v manifold on there. The kickdown is a lokar cable, which I added because whoever put the 2v manifold on didn't.

Also, can anyone tell form this photo whether the BBD is the V-8 or /6 version? I have to nudge the choke rod for it to engage properly, and it's not due to a weak spring.

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