I have a very nice Innovators west harmonic damper for a 427 chevy. I bought it for a 454 but decided to build a 427 so I sent it back to innovators west and had the weight changed . It is in the box with the 454 weight and decals and all. I never ran it, sold the engine. This is a very nice SFI damper. You can look it up on their website. We had one of these on our injected hemi nitro car. $300 plus shipping. Thanks, Lippy