Hello I'm working on an 85 F250 diesel :

Can anyone out there confirm that this truck has :

3/8" fuel lines sending to the engine

5/16" fuel lines returning to the tank

1/2" coolant hose coming in and out of the firewall


Thanks !

 

Pretty sure the heater hoses are 5/8", at least they seem to be on my 86 IDI.

- Jeff