Part of what hurt drag racing

[442OLDS]

Originally Posted by Paul Precht

The Olds 455 heads flow as well as the 915 Dodge head if not better. The 455 has 30 cubes more, .032" more lift and the Quadrajet flows at least 200 CFM more than the little 426 AFB. Unlike the 426, the Olds 455 has no limit on valve to piston clearance and when combined with the 1/2" longer stroke, much more duration can be used than with the 426. They came from the factory with the same rating but they are worlds apart in HP potential. It looks like only the 442 convert will make it down to G at it's current rating.

And with just a 5 horsepower penalty,the Dodge gets Edelbrock Aluminum Heads which are NO better than 1964 technology?