No fire to plugs less than year old

[LSUMurse]

The engine died on me yesterday. It happened while I was accelerating with no sputter or warning, I pulled over, put it in park, cranked it up and started back down the road. It happened three times, the third being the last as it will no longer start.

The fuel filter was filled way lower than usual, so I changed it thinking it was clogged, left it open on the outlet side and cranked the engine. Fuel filter and pump work fine, gas shot out of it.

I pulled the #1 plug and had the wife crank while I held it close to a ground, no fire. I tried in three different spots, including the frame, so it should have sparked.

350 crate engine I installed in November, Jegs brand HEI distributor, plugs and wires are 4 months old and look fine, all connections are tight, truck was running fine until this.

Not sure where to start. I have a Skip White HEI in the shed, should I just yank the Jegs out and try the other?