Sounds like my old Pontiac Tripower when I had her dialed in.
Unbelievable !
That is A Chevy all iron 305 Chevy from 1978-1979 I recognize the Factory valve covers.
I am hearing a 260 or 268H camshaft.
Dinky.
No way I will ever use a small Carburetor found out they sucked Fast Street Racing 30 years ago .
Mark at BLP Told me also my SD455 Carburetor actually flows 936 cfm why the TA Ran so strong with it RAIV .