Okay.. My issue is I wanted to replace the stock converter in my U code Challenger with a sightly looser one. So after doing some searching I bought a 11" TCI. From what I remember the 383 and the 440 727's received the 11.75" or 12 inch converters??? I do remember this topic from once before, and I think it was about stall speeds and such????? So, my issue is... the converter mounts don't line up with my flexplate holes? I know I'm gonna need a different flexplate, but the question is from what? Hoping John K. will chime in and help me! Lol... Once I get the tranny pulled away from the engine again I'll do some comparisons wth the old one since I wasn't smart enough to do that to begin with... I just would have thought the ring gear and converter mountng holes would've been the same and just the converter diameter would change??? Thinking maybe the one I have is incorrect for me? TIA

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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