Hi,

Took over a 19540 Chevy 3800 1-ton dually from original owners. Was a daily driver on their horse ranch. it was fired up everyday 2x a day for ranch work no problems. folks sold the ranch and it sat idle for 2 years.

Question: where these originally a 12v system? appears that old battery is 12v, looks like a alternator is installed.

Anything else to check?

What battery size should work for this?

Thanks
Boom

'50 Chevy 1 ton dually daily driver, 1960 Ford F-100, 1972 GMC C-20, 1958 Kenworth, Cat D4, 1972 Ford F100 Ranger