I tucked my solid state voltage regulator, headlight relays and a accessory fuse panel under my battery. There is also room for the ECU, but I have converted to HEI on my 65 b-body.

One with the ECU.

Sorry guys, I just cannot agree with "putting stuff under the battery."

That area ON A DRIVER is subject to a lot of road splash and grime, and on something that really does get driven, gets a certain amount of possible acid damage.

Also, having something like ignition under there makes things VERY difficult to troubleshoot

I do realize, you are trying to keep things clean looking, but for me, it's far more important that things work.

that is cool the way you did that

I made the accessory fuse panel store under the battery but flip out when needed.