The bottom line is the 235 enjoyed a nice torque line which saw near maximum torque around 1600 rpm stretching all the way over to 2800 rpm. So, one way to get more usable torque in a long flat range (without spending an arm and leg) is to use a 1959 camshaft...or one that mimics it. Good luck!
Just so happens my 235 is a '59, but it's out of a car, so not sure if that cam was any different.
