318 build #2 "cost minded" for the '74 Duster

1966 olds 425 "super rocket" was 10.25:1 and did say "Ultra High Compression" on the air cleaner as well as the compression ratio.

That somewhat heavy and long 98 with an "anti-spin" rear would actually pull the wheels if the gas pedal was mashed and released 3-4 times.