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Join Date: Mar 2007
Posts: 281
73.5 Can I just run one battery or ?

I have the stock charging system on my 73.5 cis car I just replaced the regulator with the little black box and I also had my alternator rebuilt. I am considering not running both smaller batteries and opting for one large one, will this be a problem?

Old 09-20-2007, 08:56 AM
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Done before, obviously you will need to take precautions due to weight distribution and making sure the remaining terminals don't ground out, making room for the larger battery.

Do a search on "dual batteries" and you should dig up a "how to" or a BTDT thread....
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Old 09-20-2007, 09:08 AM
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I run a single Optima red top mounted in the smuggler's box on my '73 without issue. Be very careful with the battery cables, as you do not want them grounding out. Mine terminate at an electrical cutoff switch mounted in the front trunk.
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Old 09-20-2007, 09:13 AM
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Yep, Optima lying on it's side. Works great. Mines on drivers side. I thought everyone had done this by now.

Do a search.
Old 09-20-2007, 05:32 PM
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Here's some ideas

Looking for BATTERY input...

Last edited by 911s55; 09-20-2007 at 07:14 PM..
Old 09-20-2007, 07:11 PM
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I do one in my 73.5.....Cranks a little slower when cold, be still starts right up.......

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Old 09-20-2007, 07:57 PM
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