The motor specs, .030+ 440, speedpro forged Pistons, E-Street heads out of the box, 9.25-1. MP .528 cam, 1-3/4" Doug's pickup headers with 3x18" collectors. Dyno is my L&S, calibrated before the pulls.
M-1 single plane with Carter CS 750
Weiand TunnelRam with 2 Carter CS 750's
Chrysler ShortRams cc with same 2 carbs as above.
The carbs were dialed in for each intake.
As expected the Weiand made the most hp, M-1 came in 2nd with the vintage shortrams trailing.
The numbers;
M-1 455hp@5200&507.9ftlbs@4400
Weiand TunnelRam 469.3hp@5450&542.9ftlbs@4000
Shortrams 429.2hp@5150&543.6ftlbs@3800

Now the rest of the story, the shortrams made the most torque and had the best torque average, 512.4ftlbs@2500 and just kept climbing till 3800.
The M-1 was at 451.1ftlbs@2600
The Weiand TunnelRam was 469.8ftlbs@2600
I've installed the motor in my old W-150 with the Shortrams, should be a kick ass pickup motor.