Come on John! no replacement for displacement, remember that! Forget about the mpi feed then, 1.2 spi or mpi engine will work fine with 1.0 carb and ignition. You only have to mod a little the carb.intake manifold because the bolt pattern is a bit different{ in mpi, spi is fine}, and use ellectric fuel pump.Nothing you can't do in a blink of an eye
PS: I would use this 1.2 in the car I drive often , so my choice would be talon You can always put 1.0 back under the hood some day , but I guarantee it will not happen after few on and offroad trips with 1.2 onboard