The site that I put the link up for does comment on what the differences in displacement can do. You must have 'speedread' right over it. It's a really good site for cam selection. There are some other related pages that talk about specific cams. The site owner will also help out with specific questions.
Unfortunately the exact portion of the site it's directs to only makes a comment that the effect would be at idle. Displacement effects more than just idle quality.
Anyways it's a very healthy cam for a 326 but not over the top.
Coyote, sounds like a lean condition on tip-in. Check to make sure you're getting your "pump shot" when you hit the throttle and try more fuel. You may also try adjusting the secondaries to come in a little slower.
