you might add some copper plumbing pipe to extend it, or find some rubber hose to fit, or cut the tubes off the old Ranco and solder a patch on like these that I've found in a couple heaters from trucks I've parted [one 1/2", one 5/8"]

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot