I had a N/A 440 bracket motor that I did a lot of carb swaps on, every time I put a bigger carb on it it went faster
The last swap was from a Holley 950HP on a TM7 intake to a Mopar M1 4500 intake and a Holley 1050 Dominator list # 9375 and the car pick up .25 ET and 3 MPH with no tuning or manifold prepping, the manifold didn't fit correctly the first time. The car went faster after having the intake machine to fit the motor better but I had sold the car then and I don't rememeber what that was worth on improvement