My old Charger with 426 Hemi and T-ram with 2 660 centersquirters was a tremendous torquer with the stock 68 solid cam, would pull from 20 mph in 4. gear up to top speed like a jet engine, managed 14 mpg at 50 mph cruising. I now have a 292 cam that looses some bottom end, but still runs great. I love Tunnelrams!