Nice trick for a 4150 holley

Your welcome guys, glad it can help someone. Wish i had found it years ago and some 10 spring kits and diaphragms before.
I even when as far as to build/make it machanic and remove the spring.........would make this cool little whistle noise when i would release the long skinny peddle.
In the end learned that it was the fastest with the short yellow spring, but more consistent with the purple.Couldn't fill it come on, so back to the short yellow,which was behind my back seat with all the other spring. Paint fell off, can't tell which one it is.....Back to the parts store to buy another spring kit. always wished that i could mount a camera under the hood to watch it. My thoughts never got past that point.......don't have a camera but it would be nice to know............Duhh, a simple paper clip!:poke::D