speedyyg

Who makes the best upper and lower intake manifolds? I have 30lb injectors, 65mm tb,bored to 306, 10.2:1 compression. What should I go with to get the most bang for my buck and where at?

uenvyboykin

your intake flow should match your heads and cam... but the eldebrock performer seems to be a popular intake, i also like the tubular gt-40

speedyyg

I have no idea what the flow is. I bought it from a guy who already had the work done. I know there are smaller valves since he used it for road racing. I think it might be time to take the heads off and since they will be off might need to get a 347 kit for it.