SBB diameter of flywheel

[docgsx]

Can anyone tell me the correct diameter of a SBB Flywheel. I have received 2 now that are larger diameter than the flexplate. Starter does not fit.:Dou:

[mineseats9]

I have a '67 flywheel from a Skylark and the outer diameter from tooth to tooth is 13 7/16". Uses a 10 1/2" clutch. I am no expert but, hope this helps. Let me know if you would like pics. Brian