[Mr70]

Hi Ken
Your LS-6 buildsheet shows R79W.That is NOT the same battery as the one here.Yours is different.Both are side terminal yes,but as Chris mentioned the W had a higher wattage & cold cranking amp and a much more noticeably different plastic case with an "elephant skin" grain like sides & top.

Hi Chris
Your right in that the R79S was a different rated series battery.I stand corrected in saying the R79 was the same,it isn't.I think the S also had a CCa of 410?
I should have said they are the same in appearance only.
The few anamoly vehicles I referenced earlier,have owners still having in there garage,and or paperwork showing R79 in box #49,very much like the R89W LS-6's at the end of the run.
Keith A. in Minn. has an L-78 Elco for one,as well as well as Steve M. w/an LS-6 in NC. to name another.Jamie says his is too but I haven't seen it yet,and there was also one very early built Special LS-6 assembled with an R59S top post.

Hi Tom
Yours is the optional T-60 R79W.
Not the same as the one for sale here.This was the Standard battery that actually saw less useage compared to those that were available with the optional RPO T-60.
This is a very significant battery in that it was the first delco side post battery Chevrolet tapped to be saddled up next to a Big Block with it's debut being assembled with the 1969/70 Camaro & Corvette.
Here are the pics..