Help! When I took my 1989 F350 460 apart to change the water pump, I discovered that the previous owner had replaced the original chain with a double roller. Sounds good, but it is a Ford unit and the cam gear is marked D8TE-BA then in another place are some numbers that are hard to read: 5256 or 5266 or ? I didn't spot any other part numbers. I think that means my 1989 has a 1978-era chain. Does anyone know what this might be off of and if it is 0° or a retarded timing set?
Thanks!