The M bowl will have the brass plug in the bottom of the bowl, that holds the stem in. The 6 cyl bowl will have the stem that screws in the bowl. The M stem is smaller than the 6 cyl, and might mess with fuel delivery. The 6 cyl bowl is a must for the design of that particular carburator. On the IGN, what brand of ign box? Points as a trigger or electronic pickup? MSD boxes, if thats what it is, you have to have key switched power to the wire that goes to the coil, the large red wire goes to the positve post, the small red wire goes to key switch power, like a remote on a car stereo amp. The black wire goes to ground. Now there is a white wire, and a pigtail plug with 2 wires, the pigtail wires are for electronic pickups,, (petronix) etc etc,, should have supplied plug adapters in the kit to hook up the pickup. Now if you have points, you hook the white wire to the distributor. This should leave one last wire unhooked, and that will go to the negative side of the coil. Make sure the box is grounded to the frame. If its not a MSD, the wiring will be simular, but not the same color codes, but basicly wired the same. Check all your wiring, make sure its wired up right. Next you need to test it out, not starting the engine, but test the ign. If you have points, all you have to do is pull the coil wire out of the cap, put it next to a ground, or bare metal. Your looking for spark, and should be a fast pulse when its triggered. If you got points, remove the cap and use a screwdriver and open and close the point contacts. If its working, it will fire the coil and you should see a spark from the coil wire, should be like a miniature lightning bolt, should zap more than once (multisparks) Electronic IGN, to test, you can loosen the distributor, and turn it back n forth (with the engine off) and make the magnets pass by the pick up and trigger the module to fire the coil. You can put a spark plug on the end of the coil wire and ground out the sparkplug to the frame,, whatever you see for spark from that, will be what you get inside the cyl, so, look at some different gaps on the plugs to see which gets a nice hot spark and a good jump across. Maybe, unhook everything off the IGN, go back to the regular IGN,, get it running and get the right carb bowl for that throttle body. Get it running, that way you know when it dont fire up, its not the carb, and you focus on the IGN wiring. Digital multimeter to check for voltage to know exactly whats going into the box. Hope this helps,,, if its not a MSD, will need to know a few things on the wiring diagram but aint too hard. ChadS www.thetractorshop.com
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