You can get a fitting at the local auto parts store that will screw into one size and allow you to use the other size to hook up the line. Paul In a message dated 11/9/2003 5:18:51 PM Eastern Standard Time, jsadowski@xxxxxxx writes: > Hi folks, I'm about to replace the carb on my 69 with a Carter 9636 & am >wondering how anyone that has already done this overcame the problem of having >a 5/16 fuel line & a 3/8 fitting on the carb? The instructions say you need to >use a hose & not to try to remove the carb fitting to connect the existing >metal fuel line, but offers no real advice on how to accomplish this. My first >thought was just to use the 3/8 hose & tighten the clamp a little tighter at >the fuel pump, but am having 2nd thoughts on that. Any suggestions would be > appreciated. > John