SharonAnne,
It's "me again". For '69, there were no 454s. 396 was the ONLY engine, in several power ratings. There were some "COPO" and Yenko cars with 427, but those were "dealer installed". First year for 454 was '70. It is generally accepted that the '70/'71 Chevelle SS454 with the LS-6 option (450 HP), is the "quickest" muscle car of the era (LS-7, 460 HP, was a "dealer installed" option). Only the '05/'06 GTO is even "close". Low 13s in "show room floor" condition. Add slicks, and the Hemi cars are pretty much "out of reach", easily low 12s, and in many cases 11s, stock except the tires.
The "Thunderbolt" '66 Fairlanes were 427s, not 428s. The first 428s in intermediates were in '68, and VERY rare. The 427 is a WHOLE LOT MORE engine than the 428, for racing purposes.
FWIW
Jim