Harmonic Balancer ID

[Carbo]

Hey guys, need help in identifying the HB on an LSX 454. Right now the engine is on my stand with no accessories and I'm trying to determine which balancer is on there. I know it's not a truck one. It's either an F-body or a corvette one. Is there a way to measure or look for markings? I've tried searching the last two days and haven't found anything. This will be going into a 69 camaro. Thanks in advance.

[sjaroslo]

Is this an LSX454 crate engine from GM? If so, mine, from 2012, had a 12620556 (which was impossible to read because some of the number stampings were so shallow that they got filled up with the paint on the unit). I believe that this unit was superseded by 12635649, which I believe has the Corvette offset. Hope that helps!

[Schwartz Performance]

Here you go

https://ac17cb7e3cc3506f0d23-7386afb...r10614rev6.pdf

Goofy looking URL ... or go here and click "fitment guide" https://www.holley.com/products/acce...y/parts/20-134

[Carbo]

Here you go

https://ac17cb7e3cc3506f0d23-7386afb...r10614rev6.pdf

Goofy looking URL ... or go here and click "fitment guide" https://www.holley.com/products/acce...y/parts/20-134

That's perfect. Thank you.

[Carbo]

Is this an LSX454 crate engine from GM? If so, mine, from 2012, had a 12620556 (which was impossible to read because some of the number stampings were so shallow that they got filled up with the paint on the unit). I believe that this unit was superseded by 12635649, which I believe has the Corvette offset. Hope that helps!

Yeah, I should have added that in. It's a custom built lsx 454 so it's not a crate motor. The engine builder said it was an LS1 style but I thought there were multiple versions of LS1 dampners. It looks like the link that Schwartz Perf gave is perfect. It also helped with the ID of the water pump, which is Style 1.

[Carbo]

Ok, just measured and it is 2.25." So that makes it a F-Body style, part # 19256263 (according to holley instructions). Thanks again Schwartz Perf.