440 what am I missing here?

Yes, that cam works really nice in a 500 inch short block. In a 500 inch engine it makes 600/600 and runs fairly smooth at idle with decent street manners. It is just too aggressive for a street geared, stock converter 440.

If you want to take a baby step I'd start by getting rid of the FiTech and installing a Holley Sniper with a Hyperspark distributor. The Sniper has full tuning capability and with the Hyperspark distributor you'll be able to dial in a lot of advance at idle. The extra timing will solve a lot of your tuning problems but the cam will still be a bit too big for the converter. However, once you got it fully tuned with the Sniper you might find that it runs good enough. At that point you could decide if you want to change the cam or the converter or both.