ok here's the pictures. I think they speak for themselves. Another deviation from my original plan was the location of the holes in the ammo cans. Originally I had planned to put the holes 4 in. from the top of can. However the throat on my punch was only 3 1/4" deep so the cans sit a little lower than originally planned. The one potential problem this presented was the front corner hitting the rear shock absorbers. they just barely touched when fully compressed. I used up all the wiggle room in the holes to adjust them so they would't hit the shocks. ask away if you have questions.
I used 5/16" stainless fasteners:
main bolts were 3" long.
plate to can bolts were 3/4" long.
I used 3/4" diameter hex nuts as spacers. I used some foam rubber to fill in and keep the nut centered around the 5/16" bolt.
I would like to find something else to use as spacers that is slightly thinner but these will do for now.
I plan to paint the cans when I can find time and install some locks. I'll post updated pics then.