Not with forced induction, and I doubt it NA either. Going from 65 mm to 75 mm best case would be 10 - 12 hp if you re-tune the engine for it.. You would have to dyno tune to see an improvement either way. Bolting on a larger throttle body without re-tuning the engine gives zero results. I have a 70 mm now and Vortech V3. I called Accufab and asked what would be the HP increase going to 75 mm. The tech said 3 HP at best. The area of a 70 mm throttle body is approx. 18,692 mm. The area of a 75 mm TB is approx. 20,600 mm the 75 mm adds almost 2,000 mm, not much, (considering the throttle body itself is about 50 mm long). That is about 10%. If you increased a carburetor from 600cfm to 660cfm you wouldn't see much of a gain, and that's in the neighborhood of what size throttle-body our Mustangs have. Nearly all after-market upper intakes are 75 mm so I'm not considering that. Normally aspirated speaking, the gain with the larger throttle body opening is at wide open throttle only. At partial throttle nothing is different. One negative side effect of a larger throttle body is a reduction in vacuum at wide open throttle. With the reduction in vacuum the engine will not be "pulling" the air as hard. In some cases a larger throttle body neutralizes any gains. Same as putting too large of a carburetor on an engine. The most effective way to get more power from a supercharger is to increase rpm of the turbine ie. smaller pulley or cooling the air to make it denser.
I'm only going through to explain this because most advertised HP gains from aftermarket companies is either not true, inaccurate or not applicable. Just trying to help out where I can. I'm not disagreeing with anyone and some may not agree with me, but I sure know the mod bug can lead to buying parts that don't do shyt. Chief gilly out.