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The two senders work the same. The differences I've seen between distributors of different years is in shaft diameter and distance of slot from shaft center.
If memeory serves me since books are elsewhere, if 12 volts at one of the leads TO the dist and a jumper betwen the other two causes spark, sensor is bad. If you want to try soldering go ahead, once the trigger wheel is off, if you plug it back in and pass a feeler guage through the slot, you should get a spark.
Having removed at least six trigger wheels, I'll offer some tips.
Soaking is good.
Clamp distributor in a vise using wood blocks to protect.
I place a clear plastic bag over the distributor and tape it to the body.
RE: There is a small pin, that fits between the trigger wheel and shaft that indexes the trigger wheel. It is a pin you do not wish to have fly off as you pry since it will not be seen as it disapears into neve-never-wherever.
Use two large screwdrivers at least six to 8 inches long, with wide flat tips. Poke through the plastic bag opposite each other and place just under the trigger wheels center reinforcment. A strong flashlight and a close examination will indicate where to place.
Apply equal pressure to both drivers at all times. If first placement does not work, rotate about 45 degrees without poking new holes and try again. Then go back. Keep this up until trigger starts to move.
Once the wheel starts to move you need to push the drivers toward the shaft as you push down to pry up. This keeps them under the strongest part of the wheel.
It will pop off but just before it does the effort will ease just a bit. When it does stop pushing. Then go back and ease the wheel off.
Pull the drivers out of the plastic bag. Release the dist from the vise, pinch or tape the screwdriver holes shut, turn bag and dist upside down and shake until you see the pin in the bottom of the bag.
I use a deep well socket that just fits over the shaft to push the wheel back into place after I've cleaned the shaft with a small rub of emory cloth. Pin goes back from above after wheel down easier than from below and blind. A small drift to tap it home.
Duane
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