I came upon and bought a used pristeine WH Sukhoi 87 in. wing span.

Having flown the airplane once I found the airplane to be somewhat tail heavy.

As this is my first gasser and trying not to add unnecessary weight, I have considered moving the batteries foreward to on top of the engine box / foreward of the firewall, and about 4 to 5 inches from the ignition box.

Please note that my receiver is mounted 6" aft of the wing tube, a considerable distance away from the ignition.

My questions are:

1) Would EMF generated by the ignition affect the voltage to the receiver and would it be significant?

2) Would the batteries be exposed to too much vibration if they were located at this location?

Thank you