LS1 Flexplate Spacer

I modeled this up for a friend of mine awhile ago based upon the dimensions he provided, which were found by scouring various internet forums for information.   No warranties or guarantees, but he had one machined that he tested and it fit on his particular engine.   That said  I'm pretty sure the critical dimension, the bolt circle along with the hub OD and ID, are correct.   The thickness I'm not sure.   I have not printed this but it should be an easy print with supports on bed only to hold the counter bore in the hub.   I've uploaded the .step file if you want to change it.

If you're mocking up an engine/transmission combo this could be  helpful.