Battery in trunk

My opinion, from back in the day. My 70 440-6 RR, a 10.x:1 440, I put the battery in the trunk. Used a couple of store bought braided ground cables to bolt the engine to the body at the front rails. No ground cable to the rear. Used a store bought "6v" cable for a ground, to the trunk floor, through the frame rail. I believe I bored an access hole in the bottom to reach up in there with a nut in a socket.

Hot cable was some scrap I found, not sure but certainly not as large as 0 gauge. Likely no 1.

Bear in mind this is the old wound field starter, and never even worried about it turning over. This was in about 71?? or so, and with an analog meter, I don't remember the actual voltage drop but it was inconsequential.

This is NOT the recommended method of today in a vehicle with EFI and lots of electronics.