One way to wake up the performance of your Y-Block powered 272, 292 and 312 Ford, is with the installation of a 1957 or later distributor and modern carburetor. First off, all of the Ford and Mercury Y-Block engines built before 1957 relied on a distributor that used vacuum only to advance the spark for acceleration. Even the 1956 models with the (rare and costly to replace), dual vacuum chamber distributor are fairly sluggish in acceleration. Slow spark advance also can contribute to poor fuel economy and an engine that tends to run hotter. 1957 was the performance year for the Y-Block engine and the factory made some advances that not only got you down the road faster, but it helped you pick up some fuel economy too.