[tjs44]

Steve,one reason it was pulled is the engine would not perform as good as a RAIV!EVERYTHING with the combo was no good for making HP.The dual plane intake quits around 6100,the ports are way to big and have good flo but NO velocity,the rods were way too heavy,the exhaust ports were reg pontiac design with turn down ports that have the WORST intake exhaust ratio of ANY pontiac head made.The list goes on as to the complete failure of the project.The heads need big CI,huge lift cams and hi CR to take advantage of the ports.I use a 660 lift cam in my motors.They are a great piece of pontiac history and I have tried to preserve some of it but it was and is a poor combo for racing.Tom