An RS1800 engine makes 130hp in the original Fiesta with the cat and stock manifold and exhaust fitted.

Dropping the cat and fitting a decent 4branch manifold like you have done will easily have seen the same power, most likely more, and would have cost less, as the inlet/efi comes with the engine. You dont say what ignition setup the anglia is running either, but you have said you've installed a £180 carb, and you've had to buy an adaptor, and the inlet, and fettle it all to work, plus either the shonky fiesta box or a megasquirt/megajolt on top.

The alternative would be to fit the engine and EFI setup complete, and either drop a scrapyard pump into the anglia tank, or use a lift pump and swirl pot feeding the scrapyard pump. You might even get away with using the EFI pump alone if you can mount it below the tank like i did on an old vauxhall i had.

Carbs are restrictive by their very nature, and even on something with huge 45's you either compromise your low/mid range drivability for all out power, or you choke the carb down to get decent low/midrange and your peak power falls away. With EFI that doesnt happen. Your not relying on a hole drilled in a bucket to feed the fuel into the engine, you have a nice ECU injecting the exact quantity of fuel required.