440 what am I missing here?

If you’re running the TF cam, then I’m not so sure that’s a match made in heaven for a vehicle with the self learning type of EFI and a low stall speed converter.
It’s also going to want a pretty good exhaust system.
I’d like to hear more about what the vehicle is and how it’s set up.

As for the issue of “no power”, my initial thought is the EFI is having some trouble dealing with that cam.