I think the oval port intake will fit on the peanut heads but not the other way around.
Pretty sure this is correct. I did a lot of research on intake/head combos for power a year ago and if memoy serves then an oval port intake will work on peanut heads. One thing to remember though, if that intake is a huge single plane designed for racing, all you will do is ruin your power curve. If you are using stock peanut heads then you are going to want a COMPLIMENTARY intake manifold. Get a big single plane and watch your torque go bye bye!
Edit: I see that what you are looking at is a multi-port fuel injection system. That may respond better with what looks to be a BIG single plane intake, but I would call up edelbrock or even summit first and talk about it. Thats a lot of cash for something that may hurt your performance...