A 4-6" chain, one end bolted to the flywheel where the pressure plate goes and one bolted to the flywheel housing. I do it all the time... even have a picture.

http://community.webshots.com/photo/2838480110102980561KKJENH

Grigg

•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-