My son and I just bolted a 950, 4150 Holley onto my Cleveland. The engine has the same cam as the test fpr the Funnel Web. It has 4V heads. I used to run Aussie heads. Anyway, we just gave it a trial run. I never felt the car pull so hard. It was actually a bit hard to hold in a straight line . It was pulling hard to the right. Like I said I never felt it pull like this. I have heard 4V heads are weak on the bottom end. If theis is the case I can't wait to see how it does at the track.