2:1 ratio is standard for the I6 motors, the 1350 had 1:78 and the wont see the difference on performance as both where powerhead rated engines. The carbs have the "hump" style bowl covers that only came on early 115 and 150 engine
The wire/coil colors make it a phase maker ignition and kill switch has to be closed to run. Also the colors are not in correct location. Need to pull flywheel and see what wires wwhere repaired