William's right.
Before May of 1969,the standard Camaro battery was the Delco R-59 Top terminal with a 61 Ahr.
After May 1969,the standard battery was now the NEW R-79 Delco side terminal,with the same 61 Ahr.It had a 3/8 Positive terminal & 5/16 Negative terminal to protect against cross cableing.
The optional Heavy Duty battery throughout both time periods was the Delco R-69 top post,which was available under RPO T-60.This carried a 70 Ahr.It was 3/4 of an inch taller then the R-59 to allow for larger plates and more power.This battery did NOT change over into a side post battery as some would lead you to believe.
Below is a picture of my NOS R-79,dated June 1969.
