Thanks for correcting me - I was thinking of a different kind of battery I've got and I apologize for the mistake.

The issue of gas from the battery still stands - I believe the Optima's do have blow-off ports of some kind, but I don't see it in the specs; I would expect both them and your G31 to have them.

Also, the warrenty I've seen on Optima-type batteries seems rather lame w.r.t. the advertising and cost - what's the real-life experience like?

Yes they do. There's 2 on the top (I have a red top in my toyota truck)

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

hello all Dodge Girls car has 2 red tops in trunk,she had 5 at one time other were 6's long story competition radio.but very cost efficient ,all 4ga stero multi-stran blue wire with soldered ends to match her car :lol:1 wire batt to starter 18',1 wire 6' batt to batt, 2 wires 6' ground for both batts done! works great hope this helps. Don

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'72 Duster /6 with turbo build up
'03 Ram 2500 4x4 w/HEMI 5sp 4:10 posi
My Twister Page

Mister Twiseter - you're using a 4ga 18foot battery-to-starter wire? Could you tell us the drop you actually get while cranking? What do you do for safety against a short?

In my 70 Road runner, and my 67 Barracuda I had the batteries in the trunk. I used the welding wire like you have, and ran my positive cable like normal...thru the passenger compartment along the tunnel. I mage a heavy guage engine to body ground strap. I used the ground wire from the battery to the rear frame rail. I used Marine battery boxes....and for insurance, I ran a vent tube from the top of the boxes, thru one of the center of one of the old drain hole plugs.It was vaccuum hose I used I think. As for protecting aginst shorts? I just secured the cable securly. I never once had a problem.
Kidd

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Wife's: 64 Valiant
My: 70 Road Runner, 67 Barracuda, AND the 62 Valiant drag car!!

My 340 barracuda came with the battery already in the trunk. The only thing I don't like about it is that it was installed on the driver's side. Since I'm usually alone or larger than my passenger, I'd have preferred it being on the passenger side for weight distribution. I put a quick release lever on the negative battery clamp, and I disconnect it as a theft deterrent.

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/6 '67 Barracuda convertible, electronic ignition, 4-OD, street cam, SBP KH discs, 3.55 SG 7.25" 1" t-bars. Bilstein.
340 '67 fastback, Doug Nash 5-speed.
1988 Toyota pickup work truck

Good idea on the quick release. I'll plan on installing one o' them anti-theft disconnects myself, too. I like the idea of weight distribution when mounting it on the passenger side as well. I sure hope this battery isn't too tall to put back there without issues...

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'74 Duster w/ HEI ignition, beat to snot suspension, A904, 8.25" 3.55 SG rear, still being tuned up and gets 17 MPG

Know how they always build a better idiot? That's me