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UPDATE: My local source has said he no longer has the battery box kits for sale. Appears they are becoming few and far between. But, I did find...

Sent you a PM with a possible lead.

Thanks for the compliments. You are right about the steps. It takes a bit getting used to climbing into the cab. The trick is starting with the right foot. The old set-up is easier to use, but I thought the top step got a little precarious sometimes. I had it move under foot a few times...

PM Sent. If anyone else is interested, PM me I can forward info I have regarding obtaining these kits.

This kit is designed to replace that battery box set up. I don't think I like the idea of having four batteries in the cab and, especially, under the seat. Take a look at the .pdf instruction sheet, step 3-1...it spells out how the under seat battery box is turned into the BII box. This kit...

End notes The box upgrade actually looks better on my truck than I imagined. It is a little different procedure climbing into the cab, but it all works. The plastic battery boxes are easier to remove than the original set up. There are steel cables that retain the plastic boxes when...

Step support/span bracket modification After bolting up to the frame brackets and fender support arm, the box felt a little flimsy when I stood on the step. I decided I would modify the rear angle bracket and attach it the span bracket between the two steps. With the help of my neighbor, we...

Front support I decided to use the fender rear support arm to hold up the front of the steel box. I removed the two inner bolts on the fender support bracket, dry fitted the steel box and marked the box for drilling. I drilled for 3/8” bolts then mounted the box to the frame brackets. For...

Step support/span bracket The two 45-degree support bracket would not work with the 809 install as provided. The box hangs lower in relation to the frame for these brackets to be effective. Here was where the thinking really began. The front bracket is flat and the rear has approximately...

Bracket Installation Obviously, the first thing is to remove was the original battery box set-up. Everything goes down to the frame…the only thing left are the battery cables; hot lead, the 12VDC accessory lead and the ground lead. I flipped the steel box on its head to loosely mount the...

I have had my eye on a 939-series upgrade battery box for sometime now. I thought it would be a nice to modify one these boxes for use on M818 (all 809 series trucks should be able to use this mod). Well, I came upon a rather affordable kit locally with benefit of no shipping costs. I spent a...