Under load or heavy acceleration the engine boggs down RPMs are restricted if I keep on the accelerator the engine will backfire I initially ingnition electrical and tested and replaced the ingniter due to a bad read on the D terminal to ground. The problem still exists, I then suspected the Converter blocked

Inspecting the converter I removed found partially blocked cleared blockage temporarily to see of the solved the problem not improved possibly worse. While testing the electrical components I also had a questionable read on the reluctor at resistance test from the BLU2 lead to the green wire registered 650 ohms instead of 750 ohms.Where should I look next? I plan on verifying the timing and the function of the vac advance/retard mechanism then possibly the fuel system pressure. Any suggestions would be helpful.