I currently use the Performer EPS manifold on my Chevy van with a .060 350 and a mild 211/226 @.050 cam. When I had it on the #882 heads I was happy with the performance especially accelerating such a heavy vehicle and towing a trailer. Currently I'm in the process of tuning my setup with the Performer RPM heads, a new AVS 650 carb., and Jacobs ignition. I'd be happy to let you know how it turns out.

I agree the RPM manifold is too much for your cam.

I also installed a 2" 4-hole spacer on the EPS manifold later on and that seemed to help torque.