Big Block Dart in Sherwood

Good morning. I have progressed well with my build but need help with transmission linkage. My 70 Dart has a 383 within the wells. Used the Schumacher Creative Services for engine mounts and headers. The cars drives good, but the transmission linkage is questionable. It will not shift effectively from D to 1. I used the linkage from a B body I believe. Is there a better way to shift the transmission than using the steel linkage? Maybe Lokar?

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