Yeah the 1:1 ratio setup works fine in my car too. Maybe a tiny bit too sensitive right off idle but that is it. Holley does sell a longer throttle arm which slows down the speed of the throttle opening so that can be tried. I like the 1:1 setup in terms of how the mixture gets pointed into the intake. I've had trouble with the progressive linkage on a Sniper with the mixture being pushed to the front of the intake at part throttle.

I do not have any experience with the 1:1 linkage and a two step. I'm sure people are doing it but I haven't talked to anyone who runs that setup.