6.4 Hemi and Matching Auto into Aussie Valiant

clyde said

Thanks, I have sent them an email and will post any information I receive on here. I am really keen to do this swap.

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I think You will need to open up your transmission tunnel too. They are a big gearbox.
I'm using the USCT tunnel kit for my T56 swap in a VG hardtop. USCT1M1802-67 to 75 A-Body Transmission Tunnel Perimeter Fra