just checked, the timing chain (new chain) is dead on. Harmonic balancer is good (didn't slip). Back fires out the carb at rapid throttle and has steady 9" of vacuum with timing set at 35 degrees at 3000. Now if we set the timing to 45 degree the vacuum is at steady 17" no popping out of the carb and the engine seems to run fine except for a miss between 1800 to 2300 RPM.Rotor points to #1 wire. Compression test is normal.