Today, a battery install. Following the advice of
@Mitch I went with a Odyssey 31M Battery and (not his advice) the HK-PC2150 hold down kit.
The first step was partially assembling and placing the hold down kit to check fit and alignment. Using the holes in the back of the base plate, marks were placed on the sheet metal with a sharpie.
The mount was removed and disassembled. The marks on the sheet metal and the features of the chassis base plate were copied onto tracing paper. The horizontal line you see to the right of the second largest hole marks a limit for the plus nuts. Past that line towards the relay and fuze box there isn't enough space to place a plus nut.
Tracing paper was then taped to the battery mounting plate using the original 4 marks as a guide.
Marking and drilling pilot holes.
Using the pilot holes in the base plate as a guide to drill holes in the chassis base plate. Locking the plate in place by dropping a bolt into each hole as it was drilled.
We're good! Absolutely paranoid about screwing up this part
Drill out the pilot holes for the plus nuts, mask and paint.
While that's drying. Drill out and countersink the base plate.
Plus nut install
Assemble and mount the battery holder.
Checking the clearance.
And we're done!
I'm really happy how this came out. But. Having spent 5 hours doing all this I can honestly say that you should just buy the
Adventure Wired Group 31 Hold Down Bracket. Seriously. If I had not already committed myself to this by buying all the necessary hardware. Swapping to plus nuts to account for the forces involved in holding a 80lb battery in place after having a PM conversation with Mitch. I could have been done in an hour.
I have the Slee negative battery terminal. That's for another day and another project. You can see the prep for it in the top plate of the battery mount.