Trickflow trackheat or performer rpm

That's a big-arm crank with a small cam. Both of these would make BIG torque so I doubt you're missing anything. On the street, the RPM manifold might make more bottom end but again, I doubt you're lacking bottom end torque.

Bottom line - if you keep that cam, I'd leave the current manifold on it. If you went to a much larger/longer duration cam, then maybe.... (Note: strokers EAT duration. You could easily handle a lot more cam!)