Symptoms of wrong cam installation

That is a very common cam, sold by a few companies. I would doubt that installing it in a retarded position would kill the low end performance because of the low duration/low overlap. It should have lots of tq to spin wheels with 4.10 gears. You may have a faulty cam, ground incorrectly; or valves not seating because lifter pre-load adjustment is bottomed out. There are quite a few possible causes.