I'm having problems finding a coolant bypass line (L - shape metal tube) that rubber hose connect to one end and other goes into rear of engine block by corner of intake manifold. Need one for '97 Ford 150 5.4L, can't find any at local autozone...etc

 

try here:Buy 1997 Ford F-150 Parts | FordParts.com
I can't give you exact link I wanted to since they use java-script for navigation

 

Yeah, I did look there, I wanted to find a pic/diagram of exactly same piece but couldn't find, I guess I write each part # down and google and the price seemed high I think I remember.