[RichHawk]

Is there any way to research the dimensional details of a specific Porsche Part number? Does the Part number it's self tell us something relevent?

How does one go about figuring out what clutch and flywheel might interchange with something else?

Here's the Car, engine and flywheel in question:
1989.5 964 C4 3.6L Turbo. I'm hunting for a flywheel. (In case you have one)

The flywheel originally is a single mass unit. Pelican parts says it should be part number 964-102-239-00-M260 It has a 60-2 ring. and it looks to be a 1.5 year part only.

I found this part number from a fellow member 964 102 239 31 which is a later RS style single mass flywheel with 60-2 ring. It looks the same in the limited pictures, But how can I confirm dimensions or interchangeability?

I'm tired of inferring what I can from clutch disks and pressure plates which has not conclusively led me anywhere.

Any experts?

Thanks,
Richard