Hi everyone. I recently bought a 1969 C10, with non stock engine (327) and trans. I am in need to buy parts and want to know what trans I actually have. By the pan shape it is a TH400. The usual location for the I.d. stamp is blank, but to the right of the kick down wire connection are some other numbers. There are some numbers horizontally above the vertical numbers. I cannot decifer them. Please help me figure out what I have. Thank you, Ben.