Need parts help for this clutch.

[pmat44549]

Looking for help to find out what I need to get a pedal clutch working for a open class tractor pulling engine. I normally pull antique tractors and recently acquired a open class alcohol powered 6 cylinder engine for going up in classes. I have a picture of the flywheel and am hoping for help identifying the size of the clutch. The outer bolt pattern is 12 3/8" across and I think it's a Crower and the previous owner said it was a multi disk pedal clutch. Any help would be great and I would like to get parts to make it work if possible.

Thanks!

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