George,

I don't believe that's correct. Trucks came with either 9.5 or 11 inch clutches, and looking at the parts listing (attached) there's no mention of differences do to different size clutches. The flywheels were the same diameter, just the clutch disk and pressure plate were different. The 11 inch pressure plate and flywheel used 9 bolts to attach the two together. The 11 inch clutch is fairly scarce, usually used on big bolts.
Attachments
Bell Housings.jpg (54.74 KB, 200 downloads)

Last edited by Peggy M; 05/14/2024 9:38 PM. Reason: Remove quote

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.