Do check to see what valve springs are in it if you do not already know, with a hotter cam there is going to be more over lap and a greater chance of bending a valve.
I will tell you that with the 286 degree .460 lift cam with 104 degree love separation, the car is not really happy below 4K and really wants to be above 4500. In fact there is such a noticeable lack of bottom end that putting it on my tilt trailer requires a good bit of clutch slipping or a run up it.
In general the harder you tune an A series the more it needs to rev, full race engines do nothing below 5k.
Tom