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chas;
Please explain why you want to do this in the first place.
We've read all the discussions and seen all the arguments here before...
Some arguments which I can think of, and my comments to them:
They're easier to inspect and maintain! Probably the best argument FOR. Sure disc brakes are easier to inspect and maintain, but with anti-seize on the tapered axles, the drums are no sweat to get off once a year for inspection or work either....
Disc brakes are better! Fact is, that the fronts do most (~80%) of the work anyway...braking improvement (if ANY at all) is probably negligable, and the rear caliper pistons move so little, that in my experience, they often freeze in place anyway...like on my ES, 140, 740...so they we're contributing s**t to the braking for a long time anyway...and I didn't even notice! A better upgrade would be to upgrade to the dual-diagonal hydraulic system (leaving the rear drums, see recent Thread on the subject). You still get no better brake performance, but you do get additional safety of dual hydraulic systems.
I have too much time on my hands, I love to tinker, I got a free disc brake rear-end from my cousin Bjorn, and it has a ratio I wanted to try ...hey, have fun...and from your original question, that wouldn't seem to be the case either....also if you go ahead with the project, don't expect a big, or even noticable performance improvement for all your efforts.
...just wondering!
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