Stop in for a cup of coffee

Mattax said

Sure seems like bad luck, but try to do a careful postmortum. Gas spillage plus a spark or very high heat source was needed to ignite it.
At the fuel pump its an inverted flare fitting. I'd think its pretty hard to split the line at the fitting. But you'll find out when you take apart.

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It’s the flare on the other end, where the rubber slides over. I’ll get pics.
Engine had been running and was up to operating temp. I was actually hunting down a misfire. Which I found post fire, was number 7 plug wire off at the dizzy cap. She fired right up off the key, was looking like the finish line was in sight for a shake down cruise