I recently bought a Keyed Hub from Jegs (055551607) for my 383 LT1 . Its suppose to fit 93-95 F-Bodies. My problem : The mounting holes on the Hub do not line up with my OE Crank Pulley. So I cannot mate the 2 together. I pulled the pulley off of my OE LT1 and tried to bolt it to my 383 LT1 and the allignment of the mounting holes are diffrent.

New Hub or New Pulley/Dampner?

 

The stock pulley mounting holes are asymmetrical. Not trying to insult your intelligence, but did you try aligning the pulley with each hole? It can only go on one way...

 

The holes are not off by much. It doent matter which way I turned the pulley on the hub....the holes were off by a little bit.

 

Note: LT1 hub P/N 555-51607/51608/51609 required when using our LT1 balancer P/N 555-51605/51606.

Sounds like you will need to buy the matching balancer to use that hub.

 

I think im going check into exchanging my my keyed hub for the correct part. Since its still new. What is a PART # for a keyed hub that has matching bolt pattern to my OE Pulley?

 

http://www.thunderracing.com/shop-by...ankshaft-Hubs/

 

Maybe a dumb question....OE dampners are neutrally balanced...aren't they? I know my SFI flexplate is neutrally balanced. My crank is internally balanced from Golen Engine Services.

 

The stock LT1 damper is neutral lbalanced, as any replacement should be.