I lucked out and found this one on Moparts many years ago and love it. I also have a nice LSM on engine checker but I rarely ever use it.

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1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time