I am developing a deep affection for JB weld. It is holding an a side plate for Herbs 9N radiator. So I did the same for my 77 Dodge camper van. It just survived a trip to the Arctic. 550 miles, one way of the worst gravel road. 2 days before we left, while checking the E fitting on the fuel gauge tank sender unit. It broke off, revealing a 5/16 hole, where the gas pored out. I put in a 5/16 bolt with rubber O rings, and covered with JB weld. That too survived the trip. Gave my JB weld to a trucker who had a cracked fuel pump. No results to report. Bought a new supply when I could.
YAMV Island Mike Researching HP options for the mighty 318