The H-288 should make a little over 400 - provided you zero deck the block and everything else is spot on. A dual pattern cam is a better deal in a 4V engine because the exhaust is worse on a 4V head than a 2V. If both are ported, the 2V is typically still better. If you spin an H-288 to 6500 you're just showing off, the cam will like to be shifted at 5800~6000.

If you want to run a dual plane on a 4V, run an Ed 4V dual plane because it puts the exit to the manifold port in the high activity portion of the 4V port. The new Air Gap does not - can't because the ports won't line up with a 2V port. Just sticking the higher velocity flow into the 4V port will help some, but it's far from optimal.

As far as ET - don't think you said what kind of car this is going in.

>well then the torker will be fine, i didnt want a dual plane intake, i have had bad luck with them plus that im running 1000 to 6500 ish so a single will work best.

Ed Air Gaps make big power into the 6500 range. carjunkietv.com just did a dyno test with a dual plane vs a Victor single and the dual held it's own against the signal and typically made more torque in the range you specified.

A 650DP will probably run better on the engine also.

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1967 Falcon 4 door 351C - Owner built, owner abused.
70 Mustang 351C / 06 Ranger, 04 SuperCrew parts hauler