Thread: Performer vs RPM?

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From Edelbrock, Performer:

Performer manifolds are dual-plane, low-rise intake manifolds with a 180° firing order and patented runner design that you won't find in other brands. This patented design greatly improves torque over a wide rpm range for excellent throttle response, especially off-idle through the mid-range.

And Performer RPM:

Performer RPMs are dual-plane, high-rise intakes with 180° firing order to produce incredible top-end horsepower while retaining good throttle response. Their larger plenums and runners match the free-flowing exhaust, high-lift cams and other modifications of a high output engine. They are intended for high-performance street or competition engines that run up to 6500 rpm. They are not for emissions equipped engines. Edelbrock's Performer RPM gives you the ultimate in street high-performance.

Several times it's been said on here that the Performer RPM doesn't really start flowing until it's above 3000rpm or so, and that it dogs in the low to mid range where most street rods are driven normally. I would think that the Performer manifold will be a good fit for your street driven 390, better flow than your stock manifold, and probably about half the weight, too. I'd run it for sure.