Thinking of a cam change in the near future and looking for a few suggestions. Here is what I currently have 289 bored 0.0030 over, 66 heads with Edelbrock valve springs and roller rockers, Edelbrock performer cam and intake topped of with a 600 CFM Holley. I want a bit more lumpy of a cam, but I'm on a bit of a budget and I'd to swap it out without switching springs. Any suggestions? Thanks in advance.