Maybe a pinto 2L conversion, much more potential that way as well.
The pierburg I think in them is a 2E3, in which case it is actually a very underated carb, I've replaced webers for these in the past, all picked up power and mpg at the same time.
If so it is I seem to remember a vac secondary ?, if so cut 1 1/2 coils of the spring off, the secondary will open sooner, this will make a difference, and it's free.
A huge amount of these carbs made it out the factory with a incompletely drilled through vac stub for the choke vac pull down and caused all sorts of troubles, taken loads off drilled all the way through, end of trouble with chokes.
tabetha