That 3/8 line is more than likely the fresh air intake for the PCV system...it's tapped into the fresh air side of the air cleaner. If not used I would just cap it off.

Mike B smile


Mike Boteler

1956 Chevy 3100 Resto Rod
1952 Willys M38 Army Jeep
1983 Jeep CJ7 Laredo
1984 Jeep CJ7
+++++
Silver Spring, MD