Finished up my group 31 battery mod.
I picked up a standard tray from McMaster-Carr and bolted it down to the fender well then I had a friend machine a hold down clamp for me. I powder coated it and have put a 1/32 strip of 80A high strength rubber under the bracket for a nice snug fit.
For the military battery clamp I bought a 3” X 3” inch piece of .125 thick tin flashed buss bar and machined it so I could bend it and have it bolted through the 3/8” bolt on both sides of the clamp. That was my second piece I bought so if any one needs a 1” wide by 12” long X .187 thick buss bar let me know.
Ken
Nice!