 So, in addition to building a new Pontiac Engineering building in 1949–1951, the decision to re-direct the V8 to an OHV design delayed its introduction until the 1953 model year, however the Buick division was introducing its new engine (Nailhead V-8) in 1953 and asked the corporation to hold back or delay Pontiac's V-8 introduction until the 1955 model year which it did.In mid-1956, Pontiac introduced a higher-powered version of its V8.Among other things, this version of the engine was equipped with a high-performance racing camshaft and dual 4-barrel carburetors.