@shelbygirl - can you be more descriptive of "not accelerating well"
in general you want to run a bigger gap - in OPs case from what I see in the thread the car is stock, no need to run a gap that small IMO, I run 21# of boost with a .028 gap on a TR6 copper plug, the reason to gap down is to avoid blowout of the spark due to pressures, IMO stock gap at .044 is appropriate in the OP's case
I would not put the old plugs back in. If anything re-gap the new plugs to 35-38. Make sure the coil packs are fully seated on the spark plug. If they are not they can still fire the plug so the car will run but not efficiently. I would start here and then go from there.
FYI I run a gap of 28 on my GT500 with a 2.9 Whipple and 28 in my Cobra Jet. But I run NGK plugs in both the CJ’s get changed every 10 passes as it runs on 116 octane fuel.
Gap at .028 or .032, most tuners will tell you to do that and most prefer the TR6 plugs as Gabe suggested earlier.
in general you want to run a bigger gap - in OPs case from what I see in the thread the car is stock, no need to run a gap that small IMO, I run 21# of boost with a .028 gap on a TR6 copper plug, the reason to gap down is to avoid blowout of the spark due to pressures, IMO stock gap at .044 is appropriate in the OP's case