Thanks for all the replies!

I should've said I don't take the car to the track, however I do like to stomp on the gas at a stoplight if there is an import next to me.
So it mainly gets kinda conservative use, but I do get on it from time to time.

So perhaps 750 cfm is too small? The only drawbacks of mechanical secondaries is slight/moderately worse gas mileage? Also, if I change to mechanical secondaries, should I also change my distributor to mechanical advance?

And the blurb in the description about needing some extra brackets for kickdown should be no big deal?

Thanks for the help... I really appreciate it. I'm kind of a newb with carburetors, most of my experience is with TBI.