87 amps would not be that hard but 750 amps would take some really big wires
I thought most electric cars had stuff like 4ga wires going to the motor. With that many amps it would need something like 00ga.
Ill have to look around and see what I could do to make a fet bank that can handle 750 amps. That would be probably big and a pain to build for a normal hobby type of thing though.