[Talkwrench]

Its usually hard line everywhere just the jump from the firewall to the fuel pump [or where it should be]. Try to keep it as high as practical to close to the motor and you will have problems. Oz and NZ don't seem to have the vapour lock problems. SO where is your electric pump mounted?

Also if your cooling system is ok [ looks like you may have a modern core in there] you will not need to pressurise anything, in a tank your size it will just sit about 3/4" from the top. Your in the land of the long white cloud not the Gibson desert you should be ok..