I agree. I would expect a 408 with that cam would have a torque peak in the 3800-4500 range. I have the 292 Magnum in my 440. With a 2500 flash Neal Chance 11 inch it was soft on the low end. Not that noticeable on the street, where it would just light up my hard street tires. Was a different story with the slicks bolted up. 13.24 best et with that converter. Swapped to a 10 inch GER (junk) that flashed to over 3500 .Went back to the track and went 12.93 on the one pass I made that day(forgot my helmet). The next time I went to the track I went 12.80s. Not a fair comparison though as I had also swapped the front steel wheels to Welds.
