600 CFM vs 750 CFM...

What are the overall effects of undercarbing an engine?
For example if I have a car with serious HP but dont really want the kid or wife to have access to all that power will a smallish carb curb the power but still have driveability?
The wife tolerates my current endeavor because she wants to drive an old car with a 4 speed..... I have not disclosed to her the total of power and money spent on the engine quite yet.... Lol
So Im thinking I can choke it down with a 500 Eddy for her use inittially then swap the 850 DP when I go to the track.

Hey!! At least Im not sleeping around.... Lol
Put a throttle stop on the 850 when you want to tone it down.