I have a few questions. I was trying to bolt an 11" Centerforce clutch to a 427 flywheel today. The bolt pattern on the pressure plate was too wide to fit the flywheel. It almost appeared that the flywheel was setup for a smaller clutch. All the information I have been able to find seems to indicate all 390,427, and 428's came with 11" clutches. I am using a Tremec TKO trans
1) Any clues as to what I have here? I do not know for sure what the flywheel is from. I assumed it was setup for a 427.
2) Are 427's and 390's balanced the same? are they Internal or External balanced?
3) Any suggestions on what brand and style of flywheel to buy new?
4) Any clutch suggestions, like who has the best setup for a mild sideoiler?
Any input you experts have on this will be very helpful to me on this frustrating issue. Thank you.
