I am very willing to impart a small wealth of accumulated knowledge from 37
years in business selling lead acid batteries. This used to come with the
territory when selling 8-Volt batteries. If I remember correctly, the only
stores that sell 8-Volt batteries are farm stores like Andersons, Quality
Farm & Fleet, TSC Stores to name a few.
If your 50 Olds has a BCI Group 2 6-Volt, a Group 2 8-Volt is exact fit
dimensionally. The Group 2 6-Volt measures 10 1/4" Long by 7" Wide and about
9" High to the top of post.
If your car has the BCI 2E which measures about 19 1/4" Long by 3 15/16"
Wide by about 9" High there is no exact fit 8 Volt retrofit unless you
obtain a battery tray for a BCI Group 2 and mount on a good flat level
surface for a Grp 2 8-Volt.
Word of caution, before starting vehicle you will need to install voltage
reducing resistors in the ignition circuit, lighting circuit, and accessory
circuits to minimize burnout or a electrical malfunction.
The voltage reducing resistors limit the operating voltages as if the car
still had a 6 volt battery and charging. The primary side of a 6 volt coil
only needs about 4.8 volts. Otherwise the coil, points, or condenser could
The resistance values I have forgotten. Don't give up yet, a few remaining
auto electric shops still in business may know and could sell you those.
Next step is have the generator-regulator Voltage relay to 9.2 to 9.5 Volts
and the Cutoff relay to 8.5 Volts by a qualified auto electric technician.
You may be able to drive only a short distance.
Depending upon where you live, luck may be with you in finding someone
qualified. One source may also be a auto restoration shop.
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