Will a 10.5"/10.95" Flywheel fit a Slant Six?

[Joecuda]

The slant six came with a 122 tooth 9.5" in flywheel origianlly and I want to temporarially put in a 10.5/10.95 McCleod Pressure Plate and 10.95 disc and stock flywheel and I don't know if it will fit the bellhousing! Help! Joseph Tonna

[hemi-1]

The flywheel bolt pattern for a 9-9.5 inch clutch is different from that for a 10-10.5 (or 10.95 scalloped) clutch. Even if it wasn't, I don't believe that the 10.5 clutch assembly would fit inside your bellhousing anyway. I think Clifford has HD clutch assemblies that would fit what you have.

[Joecuda]

Thanks Hemi 1! By the way, just a question: What does scalloped mean? I have heard the term, but haven't figured it out yet. Thanks.

[hemi-1]

Simple. A 10.5 inch clutch assembly has a smaller attaching bolt circle than an 11 incher, and so the flywheel bolt patterns are different. However, an 11 inch clutch disc will physically fit inside the pressure plate bolts on a 10.5 inch flywheel. The problem on 10.5 flywheel is that the thickness of the pressure plate cover where it bends around each bolt would hit an 11 inch plate--unless you cut a little semicircle or scallop into the plate surface around each bolt. Voila! Now you can run an 11 inch clutch on a 10.5 flywheel. (Only the pressure plate surface is scalloped, not the disc.)

[Joecuda]

Thanks for your help! Joecuda

[Tim_K]

The Mopar Engines manual has diagrams on this. I think I remember the /6 bolt pattern being different, so they won't interchange, and even if they did, I doubt it'd clear the bellhousing. If you need a new clutch in your /6, do what I did about 4 years ago. Go to the auto parts store, and order a 10 inch heavy duty clutch disc and pressure plate assembly. Mine was from Hampden. It is the truck clutch, and bolts on the stock flywheel. Got the flywheel reground and bolted it up. 30,000 miles later, when I took the car apart, after innumerable burnouts, dropping the clutch, and general all around abuse, everything was in great shape! You could clearly still see the grind pattern from when the flywheel was resurfaced!