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Chip Lamb at West of Sweden should be able to help you find the parts you'll need. These are no longer available new -- the only way to get them is to scrounge them from a salvaged transaxle. Chris Moberg, who posted a reply, might be able to help you too -- he rebuilds transaxles and may be able to come up with salvaged parts.
Depending on WHY your freewheel was welded up in the first place (some people weld them because they don't like freewheel, but it's more common to weld it because something broke) you may need a new hub (the part with the rollers), cup (the part it fits into; shown in Chris M's picture); locking sleeve (sliding thing that locks or unlocks it) and various other bits.
If you have a choice, ask for the old six-roller freewheel hub rather than the newer 10-roller version; the old one is stronger. Also, if you can, get the hub and cup as a complete assembly -- it saves you the sometimes tricky task of holding in all those spring-loaded rollers as you slide the hub into the cup.
Now about that "pulley" thing. I think the problem you've been hearing about isn't the pulley -- it's the balance shaft drive gear, which is behind the front timing cover on the engine. This gear is what drives the pulleys. The OEM gear was made of fiber, and can shear if subjected to too much side load, such as what you'd get with the old York piston-type AC compressor. The factory AC kit included a cast-iron balance shaft gear, which the mechanic was supposed to install as part of the kit (I've read that sometimes they spaced this off, though!)
So... if you're worried about this, you'll want to look into getting a steel timing gear set, which should be available from someplace such as Motor Sport Services in Jamestown, NY (again, see classifieds.) BUT... modern axial compressors are a lot smoother than the old York, so this may not be as big a problem today.
Incidentally, if you do work out how to do an air-conditioning install using modern parts, please keep track of what you use, take pictures, and post a how-to for the rest of us! I know there's a lot of interest in this, but it's hard to find people who actually have done it.
posted by 204.76.11...
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