ET Report Card on the Speedmaster Heads

I do. May go to 4.88’s when I do the Dana.


Both of my bracket cars have 4.88’s but they also have 14-32 slicks. When I ran 9.42@138 it was either out of valve springs, cam (solid lifter) or carb (850) she was laying down before the 1000 foot line. I think I bought 3.70’s for my heads up car. They are still sitting on a shelf as I have 4.30’s in it for some NA test hits.