Missing power 440?

Hi

I have been trying to get more power out of my 440 engine. At the moment the power is only in High RPM. Starts to go fast only after 4500rpm???

I have a 68 440 magnum, with forged pistons 10.4 compression. Ported 906 heads, Edelbrock ported Victor intake and 850cfm quickfuel double pumper carb. 284/284 MP cam with 0,484 lift.
2400 stall. Total timing 36

Last fall I had Edelbrock RPM intake and it run really good. Nice bottom end torque also. Dynoed it and it had little over 400hp
I bought victor intake , because I wanted to try it. Now it doesnt seem to work at all :(

I am gonna change the RPM intake back, but before I´ll do that. I would like to know, that do you guys only use the Victor in a drag cars, because many of my friends are saying that victor should work fine also in street car after 3000rpm. Maybe I would need to change my cam?
I have been recommended Lunati 60303 cam

Many have been wondering the problem I have, because the combo should be ok???

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