I have a customer with a tri five that wants to put an L83 into it, the 4L80 won't fit without modifying the tunnel which he wants to avoid. He wants an auto in it. Will a 4L65 work behind it does anyone know? I swapped a 2016 LT1 that i put a 5 speed behind into a 67 C10 no problem but was wondering with the 8 speed trans tuning in the ecm can it be worked to control the 4l65 or is there another option to control it?