I think the difference if I go with that is that t he box isn't NHRA acceptable, so I'll have to finish up the package tray for the "bulkhead" requirement between battery and driver. I don't know why that is required with teh optima series batteries, , they don't have any acid.

I have the steel though, it wouldn't be much work to put a piece under, or over, the package tray, save some money. thanks for the recommendation. did you use the same switch as this one? any trouble wiring it up?