More details?

I think one of the newer SM420's I have already has a front seal in the front bearing retainer. While an older one I was surprised to find did not.

Can you just swap to a bearing retainer and possibly input shaft from a newer one?
Or, whatever they can do to it I bet you can too.

Do you even need one? I ran the older one without seal for a long while, still no problems and still a dry clutch.

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-