Thinking of gaining a Lil room and clean up the engine compartment. So I am thinking about dbl vertical stack blue top optima batteries.
Does anyone have suggestions on mounts?

If this is an offshore type boat it had better be fairly stout. Couldn't you just mount them above each other on the forward firewall. That's how mine are mounted just not above each other.

it is best to put your weight down to the lowest point in a boat. Kind of like what Nascar does. Low center of gravity for better handling. Just saying. A balanced boat is always a better riding boat.

And through bolted into something, there's some significant forces at play.

Thanks guess I'll skip that idea

Nothing can be bolted to the floor on my Daytona since the floor on each side of the engine is a composite panel. There is a stringer that runs in front of the engine from side to side. The batteries are through bolted to that as close to center as the engine will allow.