the 351m isnt wanting to start. It ran untill a few days ago, I was moving the truck and it just died on me and wouldnt start back up. After a little searching I found there wasnt any spark getting to the distributor. Put a new coil on, still nothing. Found out the cap was broke so I put a new cap on. I went to crank it again and it started to turn over, then didnt. Any ideas?
If you have spark going to the distributor I would pull the cap and make sure its spinning. (You mentioned the cap was broke so thought the issue might be there)
If you have no spark from the coil to the distributor you probably need to check all the connections and probably clean the OEM horse shoe connector if you using it.