here's a picture of the 6041 I picked up.
https://picasaweb.google.com/lh/photo/qQJxqTGWw7epptXBsObIWNMTjNZETYmyPJy0liipFm0?feat=directlink

It is somewhat larger than the old Chevy 4 speeds for comparrison. I'd guess the weight around 200lb, could be more with brake and all, ought to be less than 300 though.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-