That’s a pretty engine compartment!
From what I understand from the parts manual, Europas with TC motors (not Federal) came with either Dellortos (four intake runners) or Zenith/Strombergs (two siamesed intake runners). Webers are a common replacement for the Dellortos even though by some (all?) accounts, the Dellortos offer better fuel atomization.
Weber carburetored TC motors are considered to be more desirable by many but from what I’ve heard for general street use, they don’t offer a lot of improvement over the Strombergs. It’s when you go to extract more performance - and again from what I’ve heard - that is likely toward the upper performance range of street motors - that Webers make a big difference. Certainly, Webers are theoretically better because each cylinder is tunable.
Fuel injection is certainly the step above Webers or Dellortos.
I notice the engine in your picture is dry sumped and, given the placement of the oil tank, will likely experience siphoning such that if the car sits up for an extended length of time (days to less than two weeks not weeks to months) the tank will empty and you will start your motor on no oil pressure. The tank should be located lower in relation to the oil pump inlet. There are only two places I know that allow the tank to be low enough - behind the rear wheel and in front of the front trunk. To reduce hose runs, if the tank is mounted in the rear, it should be on the same side as the oil pump.
