Heater hose routing

The heater hoses are 5/8" and 1/2". The problem your going to most likely have is that your using a later aluminum water pump with the 2 different heater hose sizes and the earlier car having 1 size on the heater core. It should be ok if you use regular hose clamps but stock type spring or corbin clamps may leak.

As for the secondaty ground wire. Put it were ever it reaches. 69 Shouldnt actuallu use one. I think they started them in 70 or 71