A couple of bugs to work out

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Terry:
Lets take into consideration that your car is 11 years old and is actually not even broken in yet with the few miles it has on it.

Place a bathroom scale against the wall. Sit down and with your right foot TRY to apply 80-95 pounds of pressure on the dial. You will see that it is quite substantial.

You should call ERA, ask for Peter and let him know you are the new owner of #377. Tell him of your brake concern. He has good diagnostic abilities on this car.

One of the first things I did when I got #375 (at the suggestion of the mechanics/builders at ERA) was to change out every fluid in the car with fresh as well as check every bolt and screw under the car for tightness and visual correctness.

My hydraulic fluid was dark.
My Trannie gear oil and rear end oil were dark.
Do some reading about the climbing gear oil from Moroso with the Amalie slip additive for the rear end.
These facts are pretty much spelled out in the ERA manual that you can download from the ERA site. Bob does a great job on that manual or should I say book.

Also, per David Kee I am not using synthetic oil in the Toploader but 75W-90 Castrol 100% dino juice.

Perhaps you should start with a bleeding of the brake fluid and thus a good visual inspection of the pads.

The ERA big brake option is for the fronts. There is an ERA special rear suspension that places the rear brakes outboard rather than inboard. So a complete big brake ERA setup has (as best I know) the bigger brakes up front and the outboard brakes in the rear.

Are you getting any squeal or pulse in your brakes?

You may want to clean your rotors with some brake cleaning fluid this would not hurt. You could also pull the front pads and scuff them up a bit with a power wire brush or sander. They could have a glaze on them.