Battery Fuses

[LakeOntario270]

I'm looking to upgrade my Catalina 270 battery system by adding a battery fuse block like the Blue Sea 2151 fuse block.
https://www.bluesea.com/products/2151/Dual_MRBF_Terminal_Fuse_Block_-_30_to_300A
Do I need a new battery box to fit this?
I was thinking using the double post with one fuse at 150 amp for starter and one fuse at 30 amps for the charger and bilge pump.

 

[sesmith]

It should fit in the box fine. I've used these on a couple of our boats. Link for fuse sizing:

http://assets.bluesea.com/files/resources/brochures/980006450.pdf