Can you give some specifics...ie was this a Cummins crate,and when did you purchase this crate engine. That will help clear up some things. It really sounds like it was a Cummins crate with your particular issues????

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1971 Roadrunner FJ6 Sassy Grass 505"RB, 18 spline 4 speed, and Dana 60 with 3.54
2022 Hellcat Charger Widebody Redeye Jailbreak: Hellraisin with 8 speed auto