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Old 07-25-2021, 05:44 AM   #1
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Cranking battery for 8.1

What size cranking battery do I need for a 2005 Pace Arrow 8.1 vortec. I was sold the wrong one now I can't remember what was originally in it.

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Old 07-25-2021, 06:02 AM   #2
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Group size 78. NAPA 7578 or 8478
2002 Fleetwood Storm 30H on Workhorse P32 chassis 8.1 gas.
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Old 07-25-2021, 07:52 AM   #3
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If you have side terminals , group 78 (10" battery) or group 79 (12" battery ) will work. If you have top terminals , a group 27 (12") or 31 (13") will work. Check the measurements of your battery tray to be sure.
1993 Tiffin Allegro Bay 32'
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Old 07-25-2021, 08:15 AM   #4
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For my Itasca with the 8.1 it uses a group 78. $100 with core at costco a few months ago.

Mark B.
Albuquerque, NM
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