Hi Darrell,
Welcome to our assylum. I'm not sure who owns a 342, but we have Kurt (who posts under the name "kewx") here who is restoring a 343. Mechanically the 342 and 343 should be nearly identical, but the body style of the two are slighly different.
You can see Kurt's photos in the photo gallery (the button is on the top right of the page) then look for a gallery by kewx), I've also posted a 300-series brochure in the Snowcat area of the Forums that may be of a little help to you, as well as a 300 to 900 series pontoon manual.
If you can share any photos or scans of other brochures, manual or materials, we' be happy to post them here. Currently we don't have a really good way to index these things, but we are working on making some changes, giving each of the snowcat brands their own gallery area so that will help us keep the materials in better order for future reference. If you have materials you can share but don't have the ability to scan, or are having trouble posting, please send me a 'PM' and I can help you out with that.