Originally Posted by
wrinklearthur
Hi Wallydog
Not sure about this and I haven't a series 3 parts manual ( yet ) to check the difference.
I far as I know the flywheels are not interchangable between the series one 2 litre, 2.6 and the 2.25 motors, as they all had different part no's.
The bushes for primary pinion do have however the same part number for all the motors up to the end of the series 2A's
2.0 litre, 4 cylinder motor, bush for primary pinion part number 08566
2.25 litre, 4 cylinder motor, bush for primary pinion part number 08566
2.6 litre, 6 cylinder motor, bush for primary pinion part number 08566
So IMHO, the larger flywheel spigot bush, most likely went to the smaller size, between the gearboxes changes from the 2A to the S3.
Cheers Arthur
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