CBmax:
Joe at DCE built the engine in my ERA back in 1992. It is a nice 428, does not leak
oil, and is dependable as the day is long. It starts first time every time and is a wonderful mill that produces alot of torque in a linear manner. We have about 17,000 miles on the engine over 12 seasons of use.
During that long period of time, one thing is pretty much evident to me regarding HP ratings and such, especially with how I use the ERA.... pretty much cruising.
In the mode of cruising in the Northeast with our bendy roads, you will NOT be spending too much time above 4800 RPM in any gear for very long. So I would scrutinize your HP ratings and torque curves in the 2800 to 4800 range. That is where you will pretty much be living.
Those numbers sound like good numbers on your engine. Hopefully it will be a real torque monster with a near flat line torque curve.
BTW, your choice of carburetor, air filter and cold air box or turkey pan will change your HP at the rear wheels.
As an aside, this spring I switched my 12 year old Holly 850 Double Pumper with mechanical secondaries out for a new Barry Grant Mighty Demon 750 double pumper with mechanical secondaries. After 12 years the old Holly was getting old and needed a rebuild. The new Demon is just super and much more responsive.