Scorpio Cosworth V6 BOA vs BOB

[CTE]

I am wondering whether anyone can advise...

As far as I am aware, the difference between the two engines is the plenumb chamber? The latter BOB produces about 10 more bhp because of this. I have always been bemused/irritated by the size and weight of the BOA plenumb chamber which I have on my car (I guess the weight is there to dampen the engine vibrations?), so does anyone know if these parts are interchangeable. I guess the latter type is more efficient. My are is runnung an Emerald ECU, and I guess the throttle body is the same??

Thanks

Mark