intake manifolds

Ive had 1 each of 69,70,and 71 340s.All were stock. All were dynomite with M/T3.55s or 3.23 autos.However all were low 14 second cars, on street tires, going 98 to 105 mph.
My 71 TQ was the sweetest.
From what I remember,the E-body LC340s of 73 were a little lazier, in stock trim.
If youre happy with your combo, dont sweat it. An intake swap, alone, may not make enough of a difference to justify the purchase price. Now if you have one laying around, thats a different story. When I was younger, I loved to swap stuff around, just to see what would happen.