What is the edelbrock p/n on the box ? That Edelbrock cam is the same one you can get from PAW for 1/2 the cost. The performer intake is the only one that will fit under the hood w/o mods to the air cleaner. Its hardly worth the swap if you are looking for performance gains. I would not waste you time changing cams unless you are planning to address the heads. The heads on the 403 is why the motor only makes 185HP stock. Get some early 67-72 olds 330/350 heads and then do a cam swap. That is how you will make power in this engine. Cheapest way unless you are rebuilding the lower end.
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