[djseed]

I only have 525 HP in my 501 (smaller hyraulic roller cam and a dual plane), but it does have 600 Ft Lbs of torque. I spend most of my time between 2K and 4.5K Lots of tractable power for accelerating and cruising. In an SPF with a Tremec and 3.73 gears, you are only doing 2K or so at 60 Mph. If you have a big cam etc, you will need to run faster to pick up the speed or your engine will lug. I guess you could downshift to 4th and run at 3K. Mine runs like a champ from 1.2K until it starts falling off at 6K. My design goal was a reliable sports rod and not a dragster. I got what I ordered.