pontiacgp said:sounds like you have the 168 tooth flexplate so it shouldn't be that hard find a starter to match it...if you get a starter with duel bolt patterns that will work with the 153 or 168 tooth flexplates...
That would be the case if he had a CHEVY motor.
Olds motors all use the same flexplate EXCEPT the 307s used in the Toronados. For some reason the flexplate is slightly smaller. This may have something to do with the passenger-side starter used on the Toros. If the flexplate has been changed, it may be an incorrect Toro flexplate. The bigger question is, did the old starter fit and work? If so, the flexplate is NOT the problem.