That battery looks like the original that was in my 1987 Monte Carlo SS from what I recall. I could look at my window sticker. I also have a bunch of build sheets that were in the car when new.
I would be interested in one for that car and my 79 z/28.
I must say that topper on the interstate looks good. I run interstate in all my cars. Just have had good luck with them.

The interstate battery’s look correct, some battery’s fit a little diff, if other than interstate, I’d recommed taking the topper to the battery store, walk around and try it on them. The battery’s w/ the built in handle fit a little diff. it’s hard to fake the opaque, the shelf at the Battery store is full here of white ones but some guys cant find the white. I took one to the Nationals for a guy in Penn, BTW, 1979 Z should be one of the blue Freedom toppers.
I need to post these too, I have some glovebox freedom battery brochures, they are real hard to find, these are exact down to the card it’s printed on., both sides just like the OG ones. $15 for the freedom card.

so which one of the above is correct for the 1979 Z/28?

The Freedom 89-5??

86 forward i believe they all had the foam surround on them also,was supposed to extend battery life and perf..

My vote is the blue top 402. What’s on your Build sheet? (Box 47 ) Box 47 should be the last 3 of the part number. A freedom 2 would even be a correct replacement. For birds, 400 was the battery, 402 was if you got the UA1 HD battery.
Mycar is full power options , A/C, and rear defog, HD Alt and still got the 400. Go figure. So that isn’t necessarily the case for a full optioned car with a HD battery.

What started this whole mess is cleaning out my moms garage I found my second battery that I put in in 1983, on a shelf under papers. it’s a replacement Free2, I still have it. I can post a pic. If anyone wants to see it. But she tossed my OG shocks. :/

Fwiw, I have an 80 Camaro (with a 267 V8) build sheet, car is long gone.
In box 47 it says 400.
.

Yep, could be either.
I asked a friend, he’s a low mile collector of the F body’s, he said 400.

The freedom 400 is the one you want.

I believe you are right.:beers:

We still have a few left of each.