This is a vintage Edelbrock OL4B aluminum intake manifold that has been modified to be used on 350/403 Oldsmobile engines with big port/big block heads installed. I talked to an Olds enthusiast friend about this and he said this was a in the know hot rod trick since the Small Block engines, especially the 403 wanted bigger ports and this was the best way to make them wake up. The amount of labor that must have gone into making this intake what it is today much have been mind boggling and very expensive to produce. This intake is in very good condition as shown. The port matching is excellent as…