Yes, I have a TCI PERFORMANCE VALVE BODY IN MY 65 C4 trany.
I can shift manual from 1, 2 ,3 and hold 1 and 2 to max it out OR I can be lazy
and let it shift itself. I like it alot.
I got mine from CJPONTPARTS.COM as there only 5 miles from me
Part number VB1 at about 286.00