It will depend on what pan came with the 454 and the vintage of the engine.
There were 2 bb pans over the years; 5 quart for B-body, Corvettes, trucks 4 quart for Camaro, Chevelle, Nova. By the late '70s BBs were truck-only engines with 5 quart pans. Some time in the '80s the BB was re-designed for a 1-piece rear main seal. This required a new-design oil pan which was of course 5 quart; earlier 4 quart Chevy pans will not fit the 1-piece rear main engine. There is an aftermarket 4 quart pan for 1-pc rear main engines, do not know who makes it but it isn't Chevy.
Figure out what you have and go from there.
