Vapor Lock On A Beautiful NW Summer Day

1...Very first thing is to make absoluty certain that tank is venting

2...Second thing is to find a service manual --which you can download, free, from MyMopar--and read the section on fuel pump testing

3...Do basic troubleshooting, IE make sure no lines are crimped, hoses rotten or collapsing, or filter plugged. Do not discount it could be the filter sock in the tank

3....Look around, somewhere over at Slant six.org is an article on fuel line modification

4....Best thing I did for my 67 although it is a V8--was convert to rear mount electric pump. This raises pressure in the fuel line which is normally under suction, and raised the boiling point----I built a return system using Wix 33040 series filter which has a built in return orifice, and use a thick insulator carb gasket