[Mattchu60]

Check the Distributor cap/rotor. I put a brand new one on my truck and only a year and a half later I had to replace it - same issue - shuddering engine, no power. The button in the cap was toast on mine when I removed it, it had ground all the way off. The first one was a house brand from summit, the 2nd one (which has lasted a lot longer so far) was an Accel brand.