Back in the late '80's...I had the "677" MP cam in my 440 powered '69 300 'vert.
Stock block/heads, just a three angle valve job, and fresh valve train. 10.1 comp. and headers.
We used a reconditioned CH4B intake, with a Holley 650. Engine ran out of steam at 4,500ish RPM.

A few months later, we swapped out to the .509 cam, installed it at 104 degrees. Changed to a new 3310 750 Holley.
What a HUGE night and day difference the way that car ran. With that combo (and a 8.75" 3.91 sure grip)...
It ran 14 teens -low 20's @99mph in the quarter mile..on L60-15 street tires and full 2-1/2" exhaust.
Won a few street races as well, including against a new (at the time) turbo T type Buick Regal.
Mr. Regal was shocked and saddened that a 4,500 lb. "big boat" had kicked his ass!