Same thing happened on our 03 f450 tapping it to 3/8 with the barb fitting sounds like a real good idea
2005 F250 6.0 powerstroke, 6 speed manual, egr delete, arp head studs, new oil cooler, aftermarket coolant filter, custom intake, 4" down pipe into dual 6" stacks, 8" lift, TSD super panty dropper tune.