Mount it anywhere you want. Some of the newer dry cells, you could even mount in the cab, under the seat or something.

http://www.jegs.com/i/Braille+Battery/147/B3121/10002/-1

http://www.jegs.com/i/Braille-Battery/147/B2317R/10002/-1?parentProductId=#moreDetails


1954 3600 Chevy Truck
"The Fake Truck"
In the Stovebolt Gallery
More pix on Photobucket