Bob Mullen is synonomous with Chrysler racing in the 70's when they owned every record. As much so as Tom Hoover was. He was one of the first to use a flow bench and his specialty was cylinder heads. Every small block racing head in exsistence now resembles the W-2 that he designed in the Mid 70's. It was good enough (with some Bob Glidden porting) to have low ET and top MPH in
every Pro Stock race in 1978 using a motor that had never been competitive in the class before, after just a winter of development work when Glidden switched brands. It also still holds the point differential record in Nascar from when Petty used them and had the biggest points lead in NASCAR history at the end of the season. Both NHRA and NASCAR changed the rules to eliminate thier use, but the damage was done. The old 1st gen W-2 heads might not look like much now compared to the newer incarnations with the better chambers, but when they came out they were no doubt the best heads you could get for a small block after porting, and they had a factory part #
