Another Martinizer, welcome to thetruckstop.
I think it might matter as to what engine was ahead of the 4L80E and which torque convertor it comes with.
Unfortunately I don’t have that information it came from a friends shop and he is not available to ask.Unfortunately it is like new but maybe it is not worth it
I think it should all just fit right together. It also seems that @THEFERMANATOR may have mentioned that the 454 and the 6.5 torque convertors might also be the same.
by using the @ sign ahead of a handle, sends that person a message, so, maybe he might jump in and reply.