measure the hard lines by putting a wrench on em. should be 5/16" or 8mm. both the same size. get transmission cooler hose or fuel injection hose. the cheap stuff they sell in bulk is 100% garbage from the day its made. suitable for water or maybe vacuum; useless for fuel or oil of any sort.

__________________
1984 300TD "MAX" 303K+ still going...
fast '70 Chevelle 200k+
home built Shovelhead chopper