Curious what's out there for a header for my 440 dart sport

I can tell you from first hand expirience pro parts partial fenderwell headers are a pain in the A$$

Agree 100% and I'd never use them again. you still have to cut quite a bit from the drivers side fenderwell. The slip on collectors are a PITA too. The drivers side tire clearance is still compromised. Might as well go under chassis or full fenderwell exit.