Nice one bruv. I sent you a text earlier but I'm guessing you have no credit!
With the single downdraught carb I wouldn't worry about that divider on the inlet manifold. For the twin SU set-up I can see why they did it as they're side-draught carbs and I'd imagine that without it you'd get induction robbery and / or issues with turbulence.
With that fat Holley sat on top I'd be tempted to get rid of the divider and let the cylinders suck on it as much as they like.
Also, with regards the fuel pump, the MG Montego Turbos used it in conjunction with a rising rate fuel pressure regulator - when it was off boost there wasn't any need for the pressure which that fuel pump can manage. But on boost, the extra psi was needed, hence why they went for such a high pressure pump.
If you get a fuel pump regulator from a Monty / Maestro / Metro turbo and just leave the pressure referencing (small) hose off it'll be alright, or just get a Malpassi fuel pressure regulator, which is all the MG ones are. I don't know if you'd get away with using a non-rising rate one (cheaper) as you don't need the rising rate bit (for turbos).
Basically, with that pump you'll be returning a lot of fuel back to the tank as it'll supply more than adequate amounts of fuel. Not a terrible situation as you know it'll be up to the demands.
Edit 2: If you're junking the mechanical SU pump I might be interested! ;D
With the single downdraught carb I wouldn't worry about that divider on the inlet manifold. For the twin SU set-up I can see why they did it as they're side-draught carbs and I'd imagine that without it you'd get induction robbery and / or issues with turbulence.
With that fat Holley sat on top I'd be tempted to get rid of the divider and let the cylinders suck on it as much as they like.
Also, with regards the fuel pump, the MG Montego Turbos used it in conjunction with a rising rate fuel pressure regulator - when it was off boost there wasn't any need for the pressure which that fuel pump can manage. But on boost, the extra psi was needed, hence why they went for such a high pressure pump.
If you get a fuel pump regulator from a Monty / Maestro / Metro turbo and just leave the pressure referencing (small) hose off it'll be alright, or just get a Malpassi fuel pressure regulator, which is all the MG ones are. I don't know if you'd get away with using a non-rising rate one (cheaper) as you don't need the rising rate bit (for turbos).
Basically, with that pump you'll be returning a lot of fuel back to the tank as it'll supply more than adequate amounts of fuel. Not a terrible situation as you know it'll be up to the demands.
Edit 2: If you're junking the mechanical SU pump I might be interested! ;D