The thing is there are at least 3 different carbs fitted to your cars engine, so without knowing which one it is there is no guarantee the webber will go on.
The 32/36 dgav is a excellent carb that can be made better for free!!, given the choice if it were mine I would be putting on a pierburg, probably the only carb everyone else will tell you not to, and 99.9% of these have never tried themselves so don't talk from experience.
Economy in my experience will be 5+ more mpg with a pierburg, and better power, once sorted.
tabetha