All Q-jets use an inverted flare 5/8-18 connection at the fuel filter housing. http://quadrajetparts.com/quadrajet-inlet-fittings-c-128_27.html
For the most part that is true, but there were a few early applications that used 5/16" fuel lines instead of 3/8". Those filter housings are difficult to obtain, far as I now all the current production fuel filter housings use 3/8" inverted flare fuel lines.......Cliff
Cliff, Greg Gessler seems to have a lot of fittings here, http://quadrajetparts.com/quadrajet-inlet-fittings-c-128_27.html The 3/8 steel line use a 5/8-18 inverted flare fitting. Did the 5/16 steel line use a smaller fitting? Like a 1/2-20?
I use SAE wrench specs too. Like a. 9/16 wrench shoulder bolt for bell housing , 5/8 wrench fuel line , I think the 1/2 inch wrench lines would be restrictive.
